Annual administrative reviews. Volunteer services.
D000375:Aging; D001782:Blood Donors; D005260:Female; D006266:Health Education; D006739:Hospital Administration; D006758:Hospital Volunteers; D006801:Humans; D007062:Identification, Psychological; D007398:Interpersonal Relations; D007878:Legislation as Topic; D008297:Male; D012179:Retirement; D012380:Role; D012737:Sex Factors; D013334:Students; D013727:Terminal Care; D014481:United States