1. Graduate School of Comprehensive Human SciencesUniversity of Tsukuba Tsukuba Ibaraki Japan
2. Department of Psychiatry, Faculty of MedicineUniversity of Tsukuba Tsukuba Ibaraki Japan
3. Research and Development Center for Health ServicesUniversity of Tsukuba Tsukuba Ibaraki Japan
4. Faculty of Human SciencesToyo Gakuen University Bunkyo Tokyo Japan
5. Department of Health Services Research, Faculty of MedicineUniversity of Tsukuba Tsukuba Ibaraki Japan