1. Department of Otorhinolaryngology, OLVG West, Amsterdam, The Netherlands
2. Department of Sleep Medicine, Harvard Medical School and Brigham and Women's Hospital, Boston, Massachusetts
3. Center for Investigation and Research in Sleep (CIRS), University Hospital of Lausanne, Switzerland
4. Sleep Disorders Unit, Loewenstein Hospital -Rehabilitation Center, Raanana, Israel
5. Department of Physiology and Sleep, Albert Michallon Hospital, Grenoble, France