1. Kitamura Institute of Mental Health Tokyo, Tokyo 151-0063, Japan
2. Kitamura KOKORO Clinic Mental Health, Tokyo 151-0063, Japan
3. T. and F. Kitamura Foundation for Mental Health Research and Skill Advancement, Tokyo 151-0063, Japan
4. Department of Psychiatry, Graduate School of Medicine, Nagoya University, Nagoya 464-8601, Japan
5. Department of Midwifery and Women’s Health, the Graduate School of Medicine, the University of Tokyo, Tokyo 113-8654, Japan
6. Nursing Faculty, Josai International University, Togane 283-0002, Japan
7. Department of Obstetrics and Gynecology, Graduate School of Medical Science, University of Tsukuba, Tsukuba 305-8577, Japan
8. Department of Obstetrics and Gynaecology, School of Medicine, Juntendo University, Tokyo 113-8421, Japan
9. Aiiku Research Institute for Maternal, Child Health and Welfare, Imperial Gift Foundation Boshi-Aiiku-Kai, Tokyo 106-0047, Japan
10. Department of Obstetrics and Gynaecology, Japanese Red Cross Medical Center, Tokyo 150-8935, Japan
11. Nagato Clinic, Tokyo 120-0002, Japan