1. Department of Psychiatry, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
2. Department of Disaster Psychiatry, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
3. Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan
4. Department of Pulmonology, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan
5. Biostatistics Center, Kurume University, Kurume, Fukuoka, Japan
6. The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville VIC, Australia
7. Tokyo Medical and Dental University, Tokyo, Japan