Affiliation: | 1. Division of Sleep Medicine, Department of Otolaryngology & Communication Sciences, Medical College of Wisconsin, , Milwaukee, Wisconsin, U.S.A;2. Department of Otorhinolaryngology, Faculty of Medicine, Khon Kaen University, , Khon Kaen, Thailand;3. Department of Otolaryngology & Communication Sciences, Medical College of Wisconsin, , Milwaukee, Wisconsin, U.S.A |