1. Universitätsklinik für Pneumologie, Inselspital, Universitätsspital Bern, Universität Bern, Bern, Schweiz
2. Sleep Research Laboratories of the University Health Network Toronto Rehabilitation Institute (KITE) and Toronto General Hospital and Department of Medicine of the University of Toronto, Toronto, Kanada
3. Swiss Sportclinic, Bern, Schweiz