title: Interference by diflunisal with the FETI method for serum thyroxine.
mesh_terms: D004061:Diflunisal / Q000097:blood*; D005188:False Negative Reactions; D005455:Fluorescent Antibody Technique; D006801:Humans; D011863:Radioimmunoassay / Q000379:methods; D012459:Salicylates / Q000097:blood*; D013974:Thyroxine / Q000097:blood*
chemical_list: D012459:Salicylates; D004061:Diflunisal; D013974:Thyroxine