1 Department of Oral Physiology, Osaka University Graduate School of Dentistry, and Sleep Medicine Center, Osaka University Hospital, Suita, Japan.
2 Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.
3 Faculty of Dental Medicine, Universite de Montreal, Stomatology-CHUM and Center for Advanced Research in Sleep Medicine, CEAMS-CIUSSS NIM, Montreal, Canada.