1. Department of Otorhinolaryngology ; Hospital Lusíadas; Porto Portugal
2. Center for Research in Health Technologies and Information Systems ; University of Porto; Porto Portugal
3. Department of Head and Neck Surgery ; University of California, Los Angeles; Los Angelis California U.S.A.
4. Department of Family Medicine ; University of California, San Francisco; Fresno California U.S.A.
5. Department of Psychiatry; Division of Sleep Medicine (C.K.), Stanford Hospital and Clinics; Redwood City California
6. Sleep Surgery Division, Department of Otolaryngology-Head & Neck Surgery (); Stanford University School of Medicine; Stanford California U.S.A.
7. Department of Psychiatry; Division of Sleep Medicine (), Stanford University School of Medicine; Stanford California U.S.A.