1 Clinical Center for Pleasant Sleep, Medical Hospital, Tokyo Medical and Dental University, Tokyo, Japan.
2 Department of Psychiatry and Behavioral Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
3 Clinical Center for Sports Medicine and Sports Dentistry, Hyperbaric Medical Center, Medical Hospital, Tokyo Medical and Dental University, Tokyo, Japan.
4 Dental Clinic for Sleep Disorders (Apnea and Snoring), Dental Hospital, Tokyo Medical and Dental University, Tokyo, Japan.