| Affiliation: | 1. Department of Pediatrics, University of Tokyo Hospital, Tokyo, Japan;2. Department of Pediatrics, Kikkoman General Hospital, Chiba, Japan;3. PAL Children's Clinic, Gunma, Japan;4. Department of Health Economics and Epidemiology Research, School of Public Health, University of Tokyo, Tokyo, Japan;5. Department of Clinical Data Management and Research, Clinical Research Center, National Hospital Organization Headquarters, Tokyo, Japan;6. Health Policy and Informatics Section, Department of Health Policy, Tokyo Medical and Dental University Graduate School, Tokyo, Japan |
