title: Sleep in patients with Parkinson's disease and normal subjects prior to and following levodopa administration.
mesh_terms: D000368:Aged; D004295:Dihydroxyphenylalanine / Q000008:administration & dosage / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000188:drug therapy*; D012890:Sleep / Q000187:drug effects*; D007319:Sleep Initiation and Maintenance Disorders / Q000188:drug therapy; D012895:Sleep, REM / Q000187:drug effects; D013997:Time Factors
chemical_list: D004295:Dihydroxyphenylalanine