[1] Tripler Army Med Ctr, Div Sleep Surg & Med, Otolaryngol Head & Neck Surg, Honolulu, HI 96859 USA
[2] Stanford Hosp & Clin, Dept Psychiat, Div Sleep Med, Redwood City, CA USA
[3] Stanford Univ, Med Ctr, Sleep Surg Div, Dept Otolaryngol Head & Neck Surg, Stanford, CA 94305 USA