title: Letter: Fixed-dose combination of trimethoprim.
mesh_terms: D004352:Drug Resistance, Microbial; D004359:Drug Therapy, Combination; D006801:Humans; D013449:Sulfonamides / Q000008:administration & dosage; D014295:Trimethoprim / Q000008:administration & dosage*
chemical_list: D013449:Sulfonamides; D014295:Trimethoprim