Telephone information services from USPHS.
Macher
A
A
Goosby
E
E
Daniels
E
E
Plotnick
J
J
D004509:Education, Nursing, Continuing; D015658:HIV Infections / Q000451:nursing*; D015277:Hotlines; D006801:Humans; D007255:Information Services; D014481:United States; D014492:United States Public Health Service