title: Cross-allergenicity of penicillins and cephalosporins.
mesh_terms: D002511:Cephalosporins / Q000009:adverse effects*; D004342:Drug Hypersensitivity; D006801:Humans; D007049:Iatrogenic Disease; D010406:Penicillins / Q000009:adverse effects*
chemical_list: D002511:Cephalosporins; D010406:Penicillins