Funding for this research was provided by:
a Grant-in-Aid for JSPS KAKENHI (JP15K09625)
a Grant-in-Aid for The International Council on Amino Acid Science Japan Research Funding
Received: 23 January 2019
Accepted: 29 July 2019
First Online: 6 August 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Graduate School of Medical Sciences, Kumamoto University. Informed consent was obtained from all the children included in this study and/or their parent.
: Not applicable.
: The authors declare that they have no competing interests.