1. Division of Health Sciences & Nursing, Department of Midwifery and Women’s Health, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
2. Kitamura Institute of Mental Health Tokyo, 101 Akasaka 8-5-13, Minato, Tokyo 107-0052, Japan
3. Nagoya University, 65 Tsurumai-cho, Showa, Nagoya, Aichi 466-8550, Japan
4. Department of Women’s Health and Mother-Child Nursing, Faculty of Life Sciences, Kumamoto University, 4-24-1 Kuhonji, Chuo, Kumamoto 862-0976, Japan
5. Aso Health Center, 1204 Uchimaki, Aso, Kumamoto 869-2301, Japan