Blackpool Teaching Hospital, Blackpool, United Kingdom
Papworth Hospital, Cambridge, United Kingdom
Freeman Hospital, Newcastle upon Tyne, Newcastle, United Kingdom
University of Utah, Salt Lake City, Utah, United States
University of California, San Diego, La Jolla, California, United States
Temple University, Philadelphia, Pennsylvania, United States
Allegheny General Hospital, Pittsburgh, Pennsylvania, United States
Universitätsklinikum Aachen, Aachen, Nordrhein-Westfalen, Germany
ResMed, Sydney, New South Wales, Australia
Sleep and Ventilation Center, Blaubeuren, Ulm, Germany
Advanced Sleep Research GmbH, Berlin, Germany
Hospital Universitario de Valme., Sevilla, Spain
ResMed Sleep Research Centre, Sydney, New South Wales, Australia
Maimonides Sleep Arts & Sciences, Albuquerque, New Mexico, United States