title: Sleep apnea in idiopathic and postencephalitic parkinsonism.
mesh_terms: D006801:Humans; D010100:Oxygen / Q000097:blood; D010300:Parkinson Disease / Q000150:complications*; D010301:Parkinson Disease, Postencephalitic / Q000150:complications*; D012891:Sleep Apnea Syndromes / Q000209:etiology*; D012895:Sleep, REM
chemical_list: D010100:Oxygen