Healthy Volunteers

**Definition:** Persons with no known significant health problems who are recruited to participate in research to test a new drug, device, or intervention as controls for a patient group. (from http://clinicalcenter.nih.gov/recruit/volunteers.html, accessed 2/14/2013)

**Tree numbers:** - M01.774.500 - M01.955.236

**Synonyms:** - Healthy Participants - Healthy Subjects