Affiliation: | 1.Department of Respiratory Medicine, Nara Medical University, Kashihara, Nara, Japan ;2.International Institute for Integrative Sleep Medicine, University of Tsukuba, Tsukuba, Japan ;3.Department of Otolaryngology-Head and Neck Surgery, Nara Medical University, Kashihara, Nara, Japan ;4.Department of Medicine, Case Western Reserve University, Cleveland, OH, USA ;5.Division of Pulmonary, Critical Care, and Sleep Medicine, University Hospitals Cleveland Medical Center, 11100 Euclid Avenue, Cleveland, OH, 44122, USA ; |