Pneumocystis carinii pneumonitis.
D000163:Acquired Immunodeficiency Syndrome / Q000150:complications; D004359:Drug Therapy, Combination; D006801:Humans; D002955:Leucovorin / Q000008:administration & dosage; D011020:Pneumonia, Pneumocystis / Q000188:drug therapy*; D011799:Quinazolines / Q000008:administration & dosage; D016597:Trimetrexate
D011799:Quinazolines; D002955:Leucovorin; D016597:Trimetrexate