Subject Headings. Descriptor . Heading, Subject . Headings, Subject . Subject Heading . Descriptors . Terms or expressions which provide the major means of access by subject to the bibliographic unit. . 1.00
Healthy Volunteers. Healthy Participants . Healthy Subjects . Human Volunteers . Normal Volunteers . Healthy Participant . Healthy Subject . Healthy Volunteer . Human Volunteer . Normal Volunteer . Participant, Healthy . Participants, Healthy . Subject, Healthy . Subjects, Healthy . Volunteer, Healthy . Volunteer, Human . Volunteer, Normal . Volunteers, Human . Volunteers, Normal . 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) . 0.78
Medical Subject Headings. MeSH Headings . Medical Subject Heading . Subject Heading, Medical . Subject Headings, Medical . Controlled vocabulary thesaurus produced by the NATIONAL LIBRARY OF MEDICINE. It consists of sets of terms naming descriptors in a hierarchical structure that permits searching at various levels of specificity. . 0.77