title: Letter: Pyridoxine and Parkinsonism.
mesh_terms: D004295:Dihydroxyphenylalanine / Q000009:adverse effects; D006801:Humans; D009325:Nausea / Q000139:chemically induced / Q000188:drug therapy; D010300:Parkinson Disease / Q000188:drug therapy*; D011736:Pyridoxine / Q000009:adverse effects*
chemical_list: D004295:Dihydroxyphenylalanine; D011736:Pyridoxine