A Three-phase Study That Will Compare the ECG Data Recorded Using the Test Device With the Data Recorded by a Reference Device, Evaluate the ECG Signal Quality of the Test Device Over a 10-day Simulated Use Period, and Assess the Effects of Variable ECG Electrode Placement for the Test Device
NCT ID: NCT07200232
Last Updated: 2025-10-01
Study Results
Results pending
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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Recruitment Status
COMPLETED
Clinical Phase
NA
Total Enrollment
45 participants
Study Classification
INTERVENTIONAL
Study Start Date
2025-01-15
Study Completion Date
2025-02-14
Brief Summary
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This clinical study will be performed in three phases.
The purpose of Phase 1 of this study is to compare the ECG data recorded using the ZywieZ3 Sensor and ZywieZ3 Adhesive ("Test Device") to the data recorded by a traditional 3-lead ECG device that uses wet Ag-AgCl adhesives in a standard lead location ("Reference Device"). The ECG signals will be recorded simultaneously with both ECG devices from the subjects in conditions that represent the devices' intended use for 1 hour. This comparison will determine whether the Test Device recordings are similar to the "gold standard" Reference Device. The testing methodology for this portion of the study is based on guidance provided by the FDA to the Sponsor.
The purpose of Phase 2 of this study is to evaluate the ECG signal quality of the Test Device over a 10-day simulated use period by human subjects. This duration of 10 days represents the expected maximum period of usage for the Test Device by the Sponsor. The skin adhesion properties of the Test Device will be evaluated, including a determination of whether any skin reactions, discoloration of the Test Device adhesive (including the snaps and hydrogel), or Test Device adhesive degradation leading to particulate formation occurs over a 10-day simulated use period by human subjects. During this testing, a human factor critical task analysis will be conducted via a collection of observational data regarding success in subject completion of Sponsor-identified critical tasks, subject completion of knowledge questionnaires relating to aspects of Sponsor-identified critical tasks, and subject completion of general subjective questionnaires regarding any difficulty they experienced with use of the Test Device. Testing methodology for this portion of the study is based upon the "Adhesive Performance (Duration of Use)" \[Section 5.4\] procedures from ANSI/AAMI Standard EC12:2000/(R)2020, Disposable ECG Electrodes and the 2016 FDA Guidance for Industry and Food and Drug Administration Staff titled "Applying Human Factors and Usability Engineering to Medical Devices."
The purpose of Phase 3 of this clinical study is to assess the effects of variable ECG electrode placement for the ZywieZ3 Sensor and ZywieZ3 Adhesive ("Test Device"). This testing is intended to determine whether ECG electrode placement variability produces unacceptable / non-clinically relevant ECG data and what level of ECG electrode placement variability is acceptable.
The purpose of Phase 1 of this study is to compare the ECG data recorded using the ZywieZ3 Sensor and ZywieZ3 Adhesive ("Test Device") to the data recorded by a traditional 3-lead ECG device that uses wet Ag-AgCl adhesives in a standard lead location ("Reference Device"). The ECG signals will be recorded simultaneously with both ECG devices from the subjects in conditions that represent the devices' intended use for 1 hour. This comparison will determine whether the Test Device recordings are similar to the "gold standard" Reference Device. The testing methodology for this portion of the study is based on guidance provided by the FDA to the Sponsor.
The purpose of Phase 2 of this study is to evaluate the ECG signal quality of the Test Device over a 10-day simulated use period by human subjects. This duration of 10 days represents the expected maximum period of usage for the Test Device by the Sponsor. The skin adhesion properties of the Test Device will be evaluated, including a determination of whether any skin reactions, discoloration of the Test Device adhesive (including the snaps and hydrogel), or Test Device adhesive degradation leading to particulate formation occurs over a 10-day simulated use period by human subjects. During this testing, a human factor critical task analysis will be conducted via a collection of observational data regarding success in subject completion of Sponsor-identified critical tasks, subject completion of knowledge questionnaires relating to aspects of Sponsor-identified critical tasks, and subject completion of general subjective questionnaires regarding any difficulty they experienced with use of the Test Device. Testing methodology for this portion of the study is based upon the "Adhesive Performance (Duration of Use)" \[Section 5.4\] procedures from ANSI/AAMI Standard EC12:2000/(R)2020, Disposable ECG Electrodes and the 2016 FDA Guidance for Industry and Food and Drug Administration Staff titled "Applying Human Factors and Usability Engineering to Medical Devices."
The purpose of Phase 3 of this clinical study is to assess the effects of variable ECG electrode placement for the ZywieZ3 Sensor and ZywieZ3 Adhesive ("Test Device"). This testing is intended to determine whether ECG electrode placement variability produces unacceptable / non-clinically relevant ECG data and what level of ECG electrode placement variability is acceptable.
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Detailed Description
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For Phase 1 and Phase 2, at least 25 subjects will participate in both study phases wearing a test and reference device for 1 hour and then the test device for a 10-day test period. Subjects will apply the Test Device on their skin by following the Sponsor-provided instructions. A Testing Facility analyst will conduct an initial visual evaluation of the level of skin adhesion for the Test Device and then apply the Reference Device to the subjects' chest. ECG data collection will be initiated for the Test Device and Reference Device by subjects and a Testing Facility analyst, respectively. During ECG data collection initiation, a Testing Facility analyst, following the 2016 FDA Guidance for Industry and Food and Drug Administration Staff titled "Applying Human Factors and Usability Engineering to Medical Devices," will collect observational data regarding each subject's success or failure to complete Sponsor-identified critical tasks correctly. Following ECG data collection initiation, subjects will complete a knowledge questionnaire to determine whether they fully understood Sponsor-identified critical tasks and a general subjective questionnaire regarding any difficulty they experienced with the use of the Test Device. Subjects will observe a 5-minute stabilization period to ensure that both devices are connected appropriately and have a stable input signal. Following the stabilization period, 25 minutes of ECG data will be collected while subjects are sitting idle. Subjects will then complete three standardized 10-minute activity periods of standing up, lying down, and repeatedly transitioning from lying down to standing up while ECG data are collected by the Test Device and Reference Device, completing a 60-minute data collection. After completing the 1-hour ECG data collection period, the reference device will be removed. Approximately 1 hour after the removal of the Reference Device, a trained Testing Facility analyst will visually score the skin condition at the relevant reference adhesive application sites. The subjects will be allowed to leave the Testing Facility and continue wearing the Test Device for 10 days. Subjects will be instructed to follow the Sponsor-provided instructions for use during this time period.
For Phase 1, subjects will be shown an instructional video and read the patient guide included in the sensor kit. Subjects will then be asked to apply the Test device themselves. A Testing Facility analyst will collect observational data regarding each subject's success or failure to complete Sponsor-identified critical tasks correctly, and the subject will complete a knowledge questionnaire to determine whether they fully understood Sponsor-identified critical tasks. The Testing Facility analyst will measure the Test device placement offset after subjects have applied the device to themselves. If the device is placed grossly incorrectly, the Training Facility Analyst will note the issue and guide the subject in correcting the adhesive placement. The analyst will not physically adjust the placement but will only provide guidance, similar to how Zywie's customer support would guide over the phone when incorrect data is identified during production use. The Sponsor will download ECG data from the Test Device from the initial 1-hour ECG data collection period from cloud-based data repositories. The testing facility will provide the Reference Device data to the Sponsor for data analysis according to the statistical analysis plan. The analysis results will be included as an appendix to the study's final report upon completion. Two cardiologists contracted by the Sponsor will independently review de-identified ECG data recorded using both devices in accordance with the statistical analysis plan. A third cardiologist, also contracted by the Sponsor, will be employed to review the ECG data collected if the first two do not agree with their assessment.
For Phase 2 on Day 10, subjects will return to the Testing Facility for a final visual evaluation of the level of skin adhesion of the Test Device by a trained Testing Facility analyst. The subject will then remove the Test Device, and a trained Testing Facility analyst will visually examine the Test Device Adhesive for any discoloration (including snaps and hydrogel) or particulate formation. At 1 hour after removal of the Test Device, a trained Testing Facility analyst will visually evaluate the skin condition at the adhesive application site.
For Phase 2, the Sponsor will download ECG data for the Test Device following the 10-day period from a cloud-based data repository for data analysis according to the statistical analysis plan. Two cardiologists contracted by the Sponsor will review the collected ECG data to determine whether the Test Device produced clinically relevant ECG data during the entire 10-day wear time. A third cardiologist, also contracted by the Sponsor, will be employed to review the ECG data collected if the first two do not agree with their assessment. Upon completion of the analysis, the analysis results will be appended to the study's final report. Skin adhesion scores and skin condition evaluations will also be summarized, and the Testing Facility will conduct a descriptive statistical analysis for each visual evaluation time point. Summaries of electrode discoloration/particulate observation evaluations will also be prepared.
For Phase 3, at least 20 subjects will participate in this study for a single test day. A testing facility analyst will apply the test device to the ideal location (control). The subjects will wear the Test Device for 15 minutes of ECG recording. The test device will then be applied to the skin in nine incorrect test locations/orientations (test positions) for all subjects as described in Appendix 2, Table 5, and worn for an additional 15 minutes of ECG recording for each test position. A statistical analysis of ECG recordings from the electrode placements will be conducted. Two cardiologists contracted by the Sponsor will independently review the ECG data recorded for the Test Device applied to the ideal (control) and 9 incorrect test locations/orientations in accordance with the statistical analysis plan. A third cardiologist, also contracted by the Sponsor, will be employed to review the ECG data collected if the first two do not agree with their assessment. Upon completion of the analysis, the analysis results will be appended to the study's final report.
For Phase 1, subjects will be shown an instructional video and read the patient guide included in the sensor kit. Subjects will then be asked to apply the Test device themselves. A Testing Facility analyst will collect observational data regarding each subject's success or failure to complete Sponsor-identified critical tasks correctly, and the subject will complete a knowledge questionnaire to determine whether they fully understood Sponsor-identified critical tasks. The Testing Facility analyst will measure the Test device placement offset after subjects have applied the device to themselves. If the device is placed grossly incorrectly, the Training Facility Analyst will note the issue and guide the subject in correcting the adhesive placement. The analyst will not physically adjust the placement but will only provide guidance, similar to how Zywie's customer support would guide over the phone when incorrect data is identified during production use. The Sponsor will download ECG data from the Test Device from the initial 1-hour ECG data collection period from cloud-based data repositories. The testing facility will provide the Reference Device data to the Sponsor for data analysis according to the statistical analysis plan. The analysis results will be included as an appendix to the study's final report upon completion. Two cardiologists contracted by the Sponsor will independently review de-identified ECG data recorded using both devices in accordance with the statistical analysis plan. A third cardiologist, also contracted by the Sponsor, will be employed to review the ECG data collected if the first two do not agree with their assessment.
For Phase 2 on Day 10, subjects will return to the Testing Facility for a final visual evaluation of the level of skin adhesion of the Test Device by a trained Testing Facility analyst. The subject will then remove the Test Device, and a trained Testing Facility analyst will visually examine the Test Device Adhesive for any discoloration (including snaps and hydrogel) or particulate formation. At 1 hour after removal of the Test Device, a trained Testing Facility analyst will visually evaluate the skin condition at the adhesive application site.
For Phase 2, the Sponsor will download ECG data for the Test Device following the 10-day period from a cloud-based data repository for data analysis according to the statistical analysis plan. Two cardiologists contracted by the Sponsor will review the collected ECG data to determine whether the Test Device produced clinically relevant ECG data during the entire 10-day wear time. A third cardiologist, also contracted by the Sponsor, will be employed to review the ECG data collected if the first two do not agree with their assessment. Upon completion of the analysis, the analysis results will be appended to the study's final report. Skin adhesion scores and skin condition evaluations will also be summarized, and the Testing Facility will conduct a descriptive statistical analysis for each visual evaluation time point. Summaries of electrode discoloration/particulate observation evaluations will also be prepared.
For Phase 3, at least 20 subjects will participate in this study for a single test day. A testing facility analyst will apply the test device to the ideal location (control). The subjects will wear the Test Device for 15 minutes of ECG recording. The test device will then be applied to the skin in nine incorrect test locations/orientations (test positions) for all subjects as described in Appendix 2, Table 5, and worn for an additional 15 minutes of ECG recording for each test position. A statistical analysis of ECG recordings from the electrode placements will be conducted. Two cardiologists contracted by the Sponsor will independently review the ECG data recorded for the Test Device applied to the ideal (control) and 9 incorrect test locations/orientations in accordance with the statistical analysis plan. A third cardiologist, also contracted by the Sponsor, will be employed to review the ECG data collected if the first two do not agree with their assessment. Upon completion of the analysis, the analysis results will be appended to the study's final report.
Conditions
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Healthy Subjects
Study Design
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Allocation Method
NON_RANDOMIZED
Intervention Model
SINGLE_GROUP
For Phase 1 and Phase 2, a single group of at least 25 subjects will participate in both study phases, wearing a test and reference device for 1 hour and then the test device for a 10-day test period. For Phase 3, a single group of at least 20 subjects will participate in this study for a single test day with 15-minute ECG readings performed with the test device at the ideal location (control) and again with the test device applied to the skin in nine incorrect test locations/orientations (test positions).
Primary Study Purpose
DIAGNOSTIC
Blinding Strategy
NONE
Study Groups
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Phase 1 Test Device Application and comparison to Reference Device
Subjects apply Test Device Sensor and Adhesive according to instructions. Analysts apply Reference Device. Subject wears both devices for 1-hour with ECG Readings collected and compared between the two devices.
Group Type
OTHER
Phase 1 Test Device Sensor and Adhesive and Reference Device
Intervention Type
DEVICE
Test Device Sensor and Adhesive and Reference Device ECG Data Collection for 1 hour
Phase 2 Test Device Sensor and Adhesive
Test Device Sensor and Adhesive consisting of a single sensor applied to an adhesive than is then applied to the upper-left chest area of a subject for 10 days
Group Type
OTHER
Phase 2 Test Device ECG Signal quality over a 10-day simulated use period
Intervention Type
DEVICE
Evaluation of the ECG-signal quality of the Test Device sensor and adhesive applied to a single site on a subject's chest to collect ECG readings for a 10-day period.
Phase 3 Variable placement of the Test Device Sensor and Adhesive
Assess the effects of variable ECG electrode placement for the Test Device Sensor and Adhesive for producing relevant ECG data
Group Type
OTHER
Test Device Sensor and Adhesive Variable Placement
Intervention Type
DEVICE
Comparison of nine incorrect locations of Test Device Sensor and Adhesive to the ideal location
Interventions
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Phase 1 Test Device Sensor and Adhesive and Reference Device
Test Device Sensor and Adhesive and Reference Device ECG Data Collection for 1 hour
Intervention Type
DEVICE
Phase 2 Test Device ECG Signal quality over a 10-day simulated use period
Evaluation of the ECG-signal quality of the Test Device sensor and adhesive applied to a single site on a subject's chest to collect ECG readings for a 10-day period.
Intervention Type
DEVICE
Test Device Sensor and Adhesive Variable Placement
Comparison of nine incorrect locations of Test Device Sensor and Adhesive to the ideal location
Intervention Type
DEVICE
Eligibility Criteria
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Inclusion Criteria
* Of the 25 subjects for Phase 1 and 2 and 20 subjects for Phase 3 who complete the study, at least 40% of subjects must be male, and at least 40% of the subjects must be female.
* Of the 25 subjects for Phase 1 and 2 and 20 subjects for Phase 3 who complete the study, no more than 50% may be white/Caucasian, and at least 50% must be classified as each of the following races: Asian, Black / African American, American Indian / Alaskan Native, and Native Hawaiian / Pacific Islander.
* Subjects must be 21 to 80 years of age. Of the 25 subjects for Phase 1 and 2 and 20 subjects for Phase 3 who complete the study, no more than 30% can be from a given quartile (21 to 36, 36 to 51, 51 to 65, and 65 to 80 year of age) of the age range.
* Subjects' body mass index (BMI) will be calculated based on their weight and height at the time of consent. BMI will be calculated using the CDC's online Adult BMI Calculator. This calculator will also automatically categorize the calculated BMI as underweight (\< 18.5), healthy (18.5 to 24.9), overweight (25.0 to 29.9), or obese (≥ 30.0). Of the 25 subjects for Phase 1 and 2 and 20 subjects for Phase 3 who complete the study, no more than 30% can be from a given BMI category.
* Subjects' education will be categorized as high school / GED, associate college degree, bachelor college degree, or post-graduate degree (e.g., M.S. or Ph.D.). Of the 25 subjects who complete Phases 1 and 2 of the study, no more than 7 subjects can be from a given educational level category.
* Of the 25 subjects who complete Phases 1 and 2 of the study, at least 7 must self-report some type of limited hand/arm dexterity.
* Subjects must be able to read, write, and understand English.
* Subjects must be in good general health (i.e., no current or recent severe illness).
* All subjects with body hair on their upper-left chest must be willing to have the body hair clipped by a Testing Facility analyst before application of the Test Device.
* Subjects participating in Phase 1 must be willing to have the body hair clipped by a Testing Facility analyst from the right clavicular region and middle of their left rib cage.
* Subjects participating in Phases 1 and 2 must be willing to clean the skin of the right clavicular region, upper-left chest, and middle of their left rib cage with 70% isopropanol preparation pads prior to their application of the Test Device and application of the Reference Device by a Testing Facility analyst. Subjects participating in Phase 3 must be willing to clean the skin of the upper-left chest with 70% isopropanol preparation pads before application of the Test Device.
* Of the 25 subjects for Phase 1 and 2 and 20 subjects for Phase 3 who complete the study, no more than 50% may be white/Caucasian, and at least 50% must be classified as each of the following races: Asian, Black / African American, American Indian / Alaskan Native, and Native Hawaiian / Pacific Islander.
* Subjects must be 21 to 80 years of age. Of the 25 subjects for Phase 1 and 2 and 20 subjects for Phase 3 who complete the study, no more than 30% can be from a given quartile (21 to 36, 36 to 51, 51 to 65, and 65 to 80 year of age) of the age range.
* Subjects' body mass index (BMI) will be calculated based on their weight and height at the time of consent. BMI will be calculated using the CDC's online Adult BMI Calculator. This calculator will also automatically categorize the calculated BMI as underweight (\< 18.5), healthy (18.5 to 24.9), overweight (25.0 to 29.9), or obese (≥ 30.0). Of the 25 subjects for Phase 1 and 2 and 20 subjects for Phase 3 who complete the study, no more than 30% can be from a given BMI category.
* Subjects' education will be categorized as high school / GED, associate college degree, bachelor college degree, or post-graduate degree (e.g., M.S. or Ph.D.). Of the 25 subjects who complete Phases 1 and 2 of the study, no more than 7 subjects can be from a given educational level category.
* Of the 25 subjects who complete Phases 1 and 2 of the study, at least 7 must self-report some type of limited hand/arm dexterity.
* Subjects must be able to read, write, and understand English.
* Subjects must be in good general health (i.e., no current or recent severe illness).
* All subjects with body hair on their upper-left chest must be willing to have the body hair clipped by a Testing Facility analyst before application of the Test Device.
* Subjects participating in Phase 1 must be willing to have the body hair clipped by a Testing Facility analyst from the right clavicular region and middle of their left rib cage.
* Subjects participating in Phases 1 and 2 must be willing to clean the skin of the right clavicular region, upper-left chest, and middle of their left rib cage with 70% isopropanol preparation pads prior to their application of the Test Device and application of the Reference Device by a Testing Facility analyst. Subjects participating in Phase 3 must be willing to clean the skin of the upper-left chest with 70% isopropanol preparation pads before application of the Test Device.
Exclusion Criteria
* Subjects cannot be currently participating in another clinical study.
* Subjects cannot have active skin rashes, dermatoses, or breaks in the skin on their clavicles, and the middle of their left rib cage for Phase 1 and 2 or on the upper left chest region for all phases.
* Subjects cannot have undergone any surgeries during the last 3 months involving incisions along their clavicles and the middle of their left rib cage for Phase 1 and Phase 2 or on the upper left chest region for all phases.
* Subjects cannot have any tattoos on their clavicles and the middle of their left rib cage for Phase 1 and Phase 2 or on the upper left chest region for all phases.
* Subjects cannot have currently inflammatory skin conditions (e.g., atopic dermatitis/eczema, contact dermatitis, or psoriasis) anywhere on the body within 2 days of the start of the test period and during the test period.
* Subjects cannot have a medical diagnosis of an organ transplant, medicated or uncontrolled diabetes, hepatitis B, hepatitis C, an immunocompromised condition such as AIDS (or HIV positive), lupus, medicated fibromyalgia, ulcerative colitis, Crohn's disease, moderate to severe asthma (requiring daily use of medication), or medicated multiple sclerosis.
* Subjects cannot have a pacemaker.
* Subjects cannot have any type of port, shunt, or Peripherally Inserted Central Catheter (PICC).
* Subjects cannot receive any vaccinations within 7 days of the start of the test period and while participating in the single-day or 10-day test period.
* Subjects cannot have known allergies or sensitivities to latex (natural rubber), adhesives, inks, sunscreens, deodorants, laundry detergents, cleansers, soaps, lotions, to topical application of fragrances (e.g., perfumes or colognes), acrylic, hydrogel, isopropyl alcohol, C11-12 isoparaffin, isopropyl palmitate, isopropyl myristate, or isopropyl stearate.
* Subjects participating in Phases 1 and 2 cannot use antihistamines within 2 days of the start of the test period through to the completion of the 10-day test period, which may interfere with the evaluation of skin reactions after application of the devices.
* Subjects cannot be pregnant or plan to become pregnant / impregnate a sexual partner during the study.
* Subjects cannot be nursing a child during the study.
* Subjects cannot have any medical condition or use any medications that, in the opinion of the Principal Investigator or Consulting Physicians, should preclude participation.
* Subjects cannot have active skin rashes, dermatoses, or breaks in the skin on their clavicles, and the middle of their left rib cage for Phase 1 and 2 or on the upper left chest region for all phases.
* Subjects cannot have undergone any surgeries during the last 3 months involving incisions along their clavicles and the middle of their left rib cage for Phase 1 and Phase 2 or on the upper left chest region for all phases.
* Subjects cannot have any tattoos on their clavicles and the middle of their left rib cage for Phase 1 and Phase 2 or on the upper left chest region for all phases.
* Subjects cannot have currently inflammatory skin conditions (e.g., atopic dermatitis/eczema, contact dermatitis, or psoriasis) anywhere on the body within 2 days of the start of the test period and during the test period.
* Subjects cannot have a medical diagnosis of an organ transplant, medicated or uncontrolled diabetes, hepatitis B, hepatitis C, an immunocompromised condition such as AIDS (or HIV positive), lupus, medicated fibromyalgia, ulcerative colitis, Crohn's disease, moderate to severe asthma (requiring daily use of medication), or medicated multiple sclerosis.
* Subjects cannot have a pacemaker.
* Subjects cannot have any type of port, shunt, or Peripherally Inserted Central Catheter (PICC).
* Subjects cannot receive any vaccinations within 7 days of the start of the test period and while participating in the single-day or 10-day test period.
* Subjects cannot have known allergies or sensitivities to latex (natural rubber), adhesives, inks, sunscreens, deodorants, laundry detergents, cleansers, soaps, lotions, to topical application of fragrances (e.g., perfumes or colognes), acrylic, hydrogel, isopropyl alcohol, C11-12 isoparaffin, isopropyl palmitate, isopropyl myristate, or isopropyl stearate.
* Subjects participating in Phases 1 and 2 cannot use antihistamines within 2 days of the start of the test period through to the completion of the 10-day test period, which may interfere with the evaluation of skin reactions after application of the devices.
* Subjects cannot be pregnant or plan to become pregnant / impregnate a sexual partner during the study.
* Subjects cannot be nursing a child during the study.
* Subjects cannot have any medical condition or use any medications that, in the opinion of the Principal Investigator or Consulting Physicians, should preclude participation.
Minimum Eligible Age
18 Years
Maximum Eligible Age
80 Years
Eligible Sex
ALL
Accepts Healthy Volunteers
Yes
Sponsors
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Zywie, Inc.
INDUSTRY
Sponsor Role
lead
Responsible Party
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Responsibility Role
SPONSOR
Locations
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Bioscience of Bozeman, LLC
Bozeman, Montana, United States
Site Status
Countries
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United States
Other Identifiers
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2410001-150
Identifier Type: -
Identifier Source: org_study_id
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