1. Department of Clinical Nursing, Shiga University of Medical Science (Maternity Nursing and Midwifery), Otsu, Japan
2. Women’s Health Nursing, Juntendo University Graduate School of Health Care and Nursing, Tokyo, Japan
3. Yamada Obstetrics and Gynecology Clinic, Kusatsu, Japan
4. Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan