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Subjects
- Sample Size[remove]4
- United States4
- Humans3
- Cost-Benefit Analysis2
- Research Design2
- United States. Department of Health and Human Services.2
- United States. Food and Drug Administration.2
- Aged1
- Aged, 80 and over1
- Blood Specimen Collection -- methods1
- Chronic Disease1
- Clinical Trials as Topic1
- Compassionate Use Trials -- standards1
- Data Collection1
- Device Approval -- standards1
- Disabled Persons1
- Drug Evaluation, Preclinical -- methods1
- Equipment and Supplies -- classification1
- Federal Government1
- Frail Elderly1