1. Department of Public Health, Faculty of Life Sciences, Kumamoto University
2. South Kyushu-Okinawa Unit Center, The Japan Environmental and Children’s Study (JECS)
3. Department of Public Health, Faculty of Medicine, University of Miyazaki
4. Department of Public Health and Hygiene, Faculty of Medicine, University of The Ryukyus
5. Department of Neonatology, Kumamoto University Hospital
6. Department of Obstetrics and Gynecology, Faculty of Life Sciences, Kumamoto University