Funding for this research was provided by:
Japan Agency for Medical Research and Development (18dm0207010h005)
Japan Agency for Medical Research and Development (18dm030701)
Japan Society for the Promotion of Science (18K15493, 15K09843)
Received: 26 February 2020
Accepted: 14 September 2020
First Online: 19 October 2020
Ethics approval and consent to participate
: The Institutional Review Board of Showa University Karasuyama Hospital approved all of the procedures adopted in this study (B-2014-019). Written informed consent was obtained from all the participants after fully explaining the purpose of this study. The authors assert that all procedures contributing to this work comply with the ethical standards of the relevant national and institutional committees on human experimentation and with the Helsinki Declaration of 1975, as revised in 2008.
: All recruited participants/parents have given consent for publication during the recruitment process.
: The authors declare that they have no competing interests.