title: Penicillin concentration in middle ear secretion in otitis.
mesh_terms: D004432:Ear, Middle; D006801:Humans; D007273:Injections, Intramuscular; D010031:Otitis / Q000188:drug therapy; D010402:Penicillin G Procaine / Q000032:analysis* / Q000097:blood / Q000627:therapeutic use; D013997:Time Factors
chemical_list: D010402:Penicillin G Procaine