title: Double-blind, placebo-controlled study of levodopa therapy in Parkinson's disease.
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D002214:Capsules; D002986:Clinical Trials as Topic; D003128:Coma / Q000139:chemically induced; D004295:Dihydroxyphenylalanine / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009460:Neurologic Examination; D010300:Parkinson Disease / Q000188:drug therapy*; D010919:Placebos; D011605:Psychoses, Substance-Induced; D012893:Sleep Wake Disorders / Q000139:chemically induced; D013997:Time Factors
chemical_list: D002214:Capsules; D010919:Placebos; D004295:Dihydroxyphenylalanine