affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Saitama University - Saitama Medical University, Saitama University - Saitama Medical University, Saitama Medical University, affiliation not provided to SSRN, affiliation not provided to SSRN, National Center for Child Health and Development, affiliation not provided to SSRN, University of Tsukuba - Department of Child Health, Niigata University - Graduate School of Medical and Dental Sciences, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Fujita Health University, affiliation not provided to SSRN, Hyogo Medical University, Sasebo City General Hospital, Fukuoka University, affiliation not provided to SSRN, affiliation not provided to SSRN, Kumamoto University, University of Miyazaki, Kagoshima University, affiliation not provided to SSRN and Saitama University - Saitama Medical University