title: Deprenyl and the progression of Parkinson's disease.
mesh_terms: D002986:Clinical Trials as Topic; D006801:Humans; D007980:Levodopa / Q000627:therapeutic use; D010300:Parkinson Disease / Q000188:drug therapy*; D010627:Phenethylamines / Q000627:therapeutic use*; D012642:Selegiline / Q000627:therapeutic use*
chemical_list: D010627:Phenethylamines; D012642:Selegiline; D007980:Levodopa