2000 PWAs to get ritonavir via expanded access.
D000163:Acquired Immunodeficiency Syndrome / Q000188:drug therapy*; D018791:CD4 Lymphocyte Count; D017320:HIV Protease Inhibitors / Q000600:supply & distribution / Q000627:therapeutic use*; D006801:Humans; D019438:Ritonavir; D013844:Thiazoles / Q000600:supply & distribution / Q000627:therapeutic use*; D014633:Valine / Q000600:supply & distribution / Q000627:therapeutic use*
D017320:HIV Protease Inhibitors; D013844:Thiazoles; D014633:Valine; D019438:Ritonavir