An 'invisible' workforce.
Trossman
Susan
S
D000575:American Nurses' Association / Q000458:organization & administration*; D002487:Centers for Disease Control and Prevention, U.S.; D015658:HIV Infections / Q000453:epidemiology / Q000517:prevention & control; D006801:Humans; D024802:Nurse's Role; D011637:Public Health Nursing / Q000458:organization & administration*; D014481:United States / Q000453:epidemiology