1. Department of Otorhinolaryngology–Head and Neck SurgeryUniversity of Pennsylvania Philadelphia Pennsylvania
2. Penn Sleep Center, University of Pennsylvania Philadelphia Pennsylvania
3. Sleep Disorders Center, University Hospital Mannheim Mannheim Germany
4. Department of OtolaryngologyUniversity of Pittsburgh Pittsburgh Pennsylvania
5. Department of Otolaryngology–Head and Neck SurgeryUniversity of Kansas Medical Center Kansas City Kansas
6. Department of Otolaryngology–Head and Neck SurgeryThomas Jefferson University Hospitals Philadelphia Pennsylvania
7. Cleveland Clinic Health SystemCleveland Clinic Cleveland Ohio
8. Head and Neck InstituteCleveland Clinic Cleveland Ohio
9. Department of OtorhinolaryngologyUniversity of Lübeck Lübeck Germany
10. Department of Otolaryngology–Head and Neck SurgeryKeck School of Medicine at University of Southern California Los Angeles California
11. Department of Otorhinolaryngology–Head and Neck SurgeryKlinikum rechts der Isar, Technical University Munich Munich Germany
12. Department of Otorhinolaryngology–Head and Neck SurgeryUniversity Hospital Mannheim Mannheim Germany
13. Department of OtolaryngologyUniversity of Alabama School of Medicine Birmingham Alabama
14. Department of MedicineCase Western Reserve University Cleveland Ohio U.S.A