1. Department of Hamamatsu Child Health and Development Hamamatsu University School of Medicine Hamamatsu Japan
2. Department of Pediatrics Fujita Health University School of Medicine Toyoake Japan
3. Department of Pediatrics Osaka Metropolitan University Graduate School of Medicine Osaka Japan
4. Department of Pediatric Hepatology and Gastroenterology Saiseikai Yokohama‐city Tobu Hospital Yokohama Japan
5. Department of Pediatrics and Child Health Nihon University School of Medicine Tokyo Japan
6. Department of Pediatrics Hiroshima University Graduate School of Biomedical and Health Sciences Hiroshima Japan
7. Child Healthcare and Genetic Science Laboratory, Division of Health Sciences Osaka University Graduate School of Medicine Suita Japan
8. Research Institute of Medical Mass Spectrometry Kurume University School of Medicine Kurume Japan
9. Laboratories Division Shimane University Hospital Izumo Japan
10. Clinical Development Department III, Development Function Research and Development Division, Daiichi Sankyo Co., Ltd. Tokyo Japan
11. Clinical Development Department Daiichi Sankyo RD Novare Co., Ltd. Tokyo Japan
12. Department of Pediatrics, Graduate School of Medical Sciences Kumamoto University Kumamoto Japan