Conflict of Interest

Yusuke Kawasaki, Junichi Tsuchiya, Akihisa Tasaki, Ukihide Tateishi, and Kota Yokoyama declare that they have no competing interests.

Ethics Statement

All procedures performed in this study involving human participant were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Consent to Participate

Written informed consent was obtained from the parent.

Consent for Publication

The participant signed consent regarding publishing his data.