title: Parkinson's syndrome--modern therapy, known facts and unanswered questions.
mesh_terms: D001921:Brain / Q000503:physiopathology; D001933:Brain Stem / Q000503:physiopathology; D055598:Chemical Phenomena; D002621:Chemistry; D004295:Dihydroxyphenylalanine / Q000009:adverse effects / Q000627:therapeutic use; D004298:Dopamine / Q000502:physiology; D005116:Extrapyramidal Tracts / Q000503:physiopathology; D006801:Humans; D010300:Parkinson Disease / Q000188:drug therapy* / Q000209:etiology / Q000503:physiopathology; D010302:Parkinson Disease, Secondary / Q000139:chemically induced; D014777:Virus Diseases / Q000150:complications
chemical_list: D004295:Dihydroxyphenylalanine; D004298:Dopamine