1 Department of Otorhinolaryngology/Head and Neck Surgery, Klinikum Rechts der Isar, Technical University of Munich, Munich, Germany [email protected].
2 HNO-Zentrum Mangfall-Inn, Institute for Sleep Medicine, Bad Aibling, Germany.
3 Department of Medicine, University of British Columbia, Vancouver, BC, Canada.
4 Leon Judah Blackmore Centre for Sleep Disorders, University of British Columbia Hospital, Vancouver, BC, Canada.