1. Department of Psychiatry; Sleep Medicine Division; Stanford Outpatient Medical Center; Redwood City California U.S.A
2. Department of Head and Neck Surgery; University of California; Los Angeles California
3. Department of Otorhinolaryngology; Hospital Lusíadas; Porto Portugal
4. CINTESIS-Center for Research in Health Technologies and Information Systems, University of Porto; Porto Portugal
5. Department of Otorhinolaryngology; Hospital Bernardino Rivadavia; Buenos Aires Argentina
6. Stanford School of Medicine; Stanford California
7. Reynolds Army Community Hospital; Fort Sill Oklahoma U.S.A
8. Department of Otolaryngology-Head and Neck Surgery; Sleep Surgery Division; Stanford University Medical Center; Stanford California U.S.A
9. Department of Otolaryngology-Head and Neck Surgery; Walter Reed National Military Medical Center; Bethesda Maryland U.S.A
10. Department of Psychiatry; Division of Sleep Medicine; Stanford Hospital and Clinics; Redwood City California U.S.A