Article History
Received: 11 August 2020
Accepted: 15 September 2020
First Online: 6 October 2020
Compliance with ethical standards
:
: The authors declare no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Institutional Research Committee and/or National Research Committee at which the study was conducted with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The ethics committee of Saitama Children’s Medical Center approved this study (approval number 2019-03-003).