1. Department of Psychiatry, Division of Sleep Medicine, Stanford Hospital and Clinics, Redwood City, CA
2. Department of Otorhinolaryngology/ Sleep Medicine Centre, Hospital CUF Porto; CINTESIS, Center for Research in Health Technologies and Information Systems, University of Porto, Porto, Portugal
3. Department of Otorhinolaryngology, Hospital Bernardino Rivadavia, Buenos Aires, Argentina
4. Department of Head and Neck Surgery, University of California, Los Angeles, CA
5. Department of Otolaryngology, Head and Neck Surgery, Sleep Surgery Division, Stanford University Medical Center, Stanford, CA