Otitis media; then and now.
D006801:Humans; D008417:Mastoiditis / Q000209:etiology*; D019637:Orthopedic Procedures; D010033:Otitis Media / Q000150:complications*; D010406:Penicillins / Q000627:therapeutic use*; D014432:Tympanic Membrane / Q000601:surgery*
D010406:Penicillins
MASTOIDITIS/etiology and pathogenesis; OTITIS MEDIA/complications; PENICILLIN/therapeutic use; TYMPANIC MEMBRANE/surgery