1. Department of Health Policy National Center for Child Health and Development Tokyo Japan
2. Division of Radiation Oncology National Center for Child Health and Development Tokyo Japan
3. Centre for Health Economics Monash University Melbourne Australia
4. Faculty of Economics Saitama University Saitama Japan
5. Graduate School of Medicine Kyoto University Kyoto Japan
6. Momiji House National Center for Child Health and Development Tokyo Japan
7. National Institute of Population and Social Security Research Tokyo Japan