Letter: Ampicillin or penicillin for otitis media: a controversy further clarified.
D000667:Ampicillin / Q000627:therapeutic use*; D002675:Child, Preschool; D006801:Humans; D010033:Otitis Media / Q000188:drug therapy*; D010406:Penicillins / Q000627:therapeutic use*
D010406:Penicillins; D000667:Ampicillin