1. Milliman Inc, Tokyo, Japan
2. Department of Healthcare Epidemiology, School of Public Health, Graduate School of Medicine, Kyoto University, Kyoto, Japan
3. Data Intelligence Dept., Nippon Shinyaku Co., Ltd, Kyoto, Japan
4. Medical Planning Dept., Nippon Shinyaku Co., Ltd, Kyoto, Japan
5. Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Tokyo, Japan