On the immunological cross-reaction between penicillins and cephalosporins.
D002511:Cephalosporins / Q000276:immunology*; D003429:Cross Reactions; D004342:Drug Hypersensitivity / Q000276:immunology*; D006801:Humans; D010406:Penicillins / Q000276:immunology*
D002511:Cephalosporins; D010406:Penicillins