title: Five-year absence of Pneumocystis carinii pneumonitis in a pediatric oncology center.
mesh_terms: D002648:Child; D006801:Humans; D009369:Neoplasms / Q000150:complications; D011020:Pneumonia, Pneumocystis / Q000517:prevention & control*; D013420:Sulfamethoxazole / Q000627:therapeutic use*; D014295:Trimethoprim / Q000627:therapeutic use*
chemical_list: D014295:Trimethoprim; D013420:Sulfamethoxazole