title: Letter: Effect of diphenylhydantoin on serum copper, zinc and magnesium.
mesh_terms: D001798:Blood Proteins / Q000032:analysis; D003300:Copper / Q000097:blood*; D005069:Evaluation Studies as Topic; D006801:Humans; D008274:Magnesium / Q000097:blood*; D008722:Methods; D008832:Microchemistry; D010672:Phenytoin / Q000097:blood*; D015032:Zinc / Q000097:blood*
chemical_list: D001798:Blood Proteins; D010672:Phenytoin; D003300:Copper; D008274:Magnesium; D015032:Zinc