1. Graduate School of Humanities and Social Sciences, Department of Psychology, Hiroshima University, Hiroshima, Japan
2. Faculty of Liberal Arts, Meiji Pharmaceutical University, Tokyo, Japan
3. Department of Somnology, Tokyo Medical University, Tokyo, Japan
4. Japan Somnology Center, Neuropsychiatric Research Institute, Tokyo, Japan
5. Department of Psychology, Faculty of Health and Wellness Sciences, Hiroshima International University, Hiroshima, Japan