Other options: clinical trials.
D018791:CD4 Lymphocyte Count; D002986:Clinical Trials as Topic; D015658:HIV Infections / Q000188:drug therapy*; D017320:HIV Protease Inhibitors / Q000627:therapeutic use*; D006801:Humans; D019469:Indinavir / Q000627:therapeutic use*; D019888:Nelfinavir / Q000627:therapeutic use*; D018579:Patient Selection; D016879:Salvage Therapy; D017211:Treatment Failure; D019562:Viral Load
D017320:HIV Protease Inhibitors; D019469:Indinavir; D019888:Nelfinavir