1. Department of Obstetrics and Gynecology Tohoku University Graduate School of Medicine Sendai Miyagi Japan
2. Women's Health Care Medical Science Tohoku University Graduate School of Medicine Sendai Miyagi Japan
3. Tohoku Medical Megabank Organization Tohoku University Sendai Miyagi Japan
4. Underwriting and Medical Department The Dai‐ichi Life Insurance Company, Limited Koto‐ku Tokyo Japan
5. Division of Public Health, Hygiene and Epidemiology Tohoku Medical Pharmaceutical University Sendai Miyagi Japan
6. Division of Molecular Epidemiology Tohoku University Graduate School of Medicine Sendai Miyagi Japan
7. International Research Institute of Disaster Science Tohoku University Sendai Miyagi Japan
8. Environment and Genome Research Center Tohoku University Graduate School of Medicine Sendai Miyagi Japan
9. Department of Maternal and Fetal Therapeutics Tohoku University Graduate School of Medicine Sendai Miyagi Japan