Yale New Haven Medical Center, New Haven, Connecticut, United States
Northwestern Memorial Hospital, Chicago, Illinois, United States
Tampa General Hospital, Tampa, Florida, United States
Klinikum Bremen-Mitte, Bremen, Germany
Catharina-ziekenhuis, Eindhoven, Netherlands
Medical Center Linköping, Linköping, Sweden
Albany Medical College, Albany, New York, United States
Greenville Hospital System, Greenville, South Carolina, United States
University of Kentucky, Lexington, Kentucky, United States
Clayton Sleep Institute, Maplewood, Missouri, United States
SleepFit, Broomfield, Colorado, United States
Sleep Medicine Centers, West Seneca, New York, United States
Dep. of Visceral and Transplantsurgery, Bern University Hospital, Bern, Switzerland
Greenville Hospital System, Greenville, South Carolina, United States
University Hospitals at Case Medical Center, Cleveland, Ohio, United States
Emory University School of Medicine, Atlanta, Georgia, United States
University of Louisville, Louisville, Kentucky, United States
Hospital Sanitas La Moraleja Sanchinarro, Madrid, Spain
Mayo Clinic, Rochester, Minnesota, United States
Columbia University, New York, New York, United States
University of Minnesota, Minneapolis, Minnesota, United States
Klinikum Ludwigshafen gGMBH, Ludwigshafen, Bremserster 79, Germany
Evangelisches Krankenhaus, Duesseldorf, Germany
Allgemeines Krankenhaus Altona, Hamburg, Germany
Ospedale Gemelli, Rome, Italy
CHU Nancy, Nancy, France
CHU Lyon, Lyon, France