Streptococcal pharyngitis: a persistent challenge.
D002675:Child, Preschool; D004917:Erythromycin / Q000627:therapeutic use; D006801:Humans; D010406:Penicillins / Q000627:therapeutic use*; D010612:Pharyngitis / Q000175:diagnosis / Q000188:drug therapy* / Q000209:etiology; D013290:Streptococcal Infections / Q000188:drug therapy*
D010406:Penicillins; D004917:Erythromycin