1. Department of Obstetrics and Gynecology Hamamatsu Medical Center Hamamatsu Japan
2. The Study Group for Hereditary Thrombophilia, Research on Blood Coagulation Abnormalities, Research Program on Rare and Intractable Diseases The Ministry of Health, Labour and Welfare Science Research Grants Tokyo Japan
3. Department of Laboratory Sciences, College of Medical, Pharmaceutical and Health Sciences Kanazawa University Kanazawa Japan
4. Institute of Distribution Sciences Nakamura Gakuen University Fukuoka Japan
5. Division of Counseling for Medical Genetics, Department of Obstetrics and Gynecology National Cerebral and Cardiovascular Center Suita Japan
6. Medical Division Aichi Health Promotion Foundation Nagoya Japan
7. Department of Pediatrics, Graduate School of Medical Sciences Kyushu University Fukuoka Japan
8. Department of Obstetrics and Gynecology, Aiiku Maternal and Child Health Center Aiiku Hospital Tokyo Japan
9. Department of Cerebrovascular Medicine National Cerebral and Cardiovascular Center Suita Japan