Affiliation: | 1. Vitalmed Research Center, Helsinki Sleep Clinic, Helsinki, Finland;2. Department of Neurology, Hospital of Laakso, Helsinki, Finland;3. The Finnish Parkinson Association, Turku, Finland;4. Department of Adult Neurology, Medical University of Gdansk, Gdansk, Poland;5. Department of Clinical Neurosciences, Institute of Clinical Medicine, University of Helsinki, Helsinki, Finland |