title: The risk of Pneumocystis carinii pneumonia.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000150:complications; D015496:CD4-Positive T-Lymphocytes; D006801:Humans; D007958:Leukocyte Count; D008297:Male; D011020:Pneumonia, Pneumocystis / Q000209:etiology*; D012307:Risk Factors