title: Study design problems of DATATOP study analysis.
authors.forename: O
authors.initials: O
authors.lastname: Mäki-Ikola
authors.forename: E
authors.initials: E
authors.lastname: Heinonen
mesh_terms: D002986:Clinical Trials as Topic; D006801:Humans; D007980:Levodopa / Q000009:adverse effects / Q000627:therapeutic use; D010300:Parkinson Disease / Q000188:drug therapy*; D010919:Placebos; D016032:Randomized Controlled Trials as Topic; D012642:Selegiline / Q000627:therapeutic use*; D014810:Vitamin E / Q000627:therapeutic use
chemical_list: D010919:Placebos; D014810:Vitamin E; D012642:Selegiline; D007980:Levodopa