US drug regulation. AIDS politics change rules.
Schaefer
E
E
D000163:Acquired Immunodeficiency Syndrome / Q000188:drug therapy*; D016049:Didanosine / Q000627:therapeutic use*; D006801:Humans; D007880:Legislation, Drug; D014481:United States; D014486:United States Food and Drug Administration; D016047:Zalcitabine / Q000627:therapeutic use*
D016047:Zalcitabine; D016049:Didanosine