Kanai, Takahiro
Shiizaki, Kazuhiro
Betsui, Hiroyuki
Aoyagi, Jun
Yamagata, Takanori
Article History
Received: 10 April 2018
Accepted: 11 May 2018
First Online: 16 May 2018
Compliance with ethical standards
:
: The authors have declared that no conflict of interests exists.
: All authors read this manuscript and approved it for publication.
: This study complies with the Declaration of Helsinki and was approved by the Ethics Committee of Jichi Medical University (A17-0088).
: All procedures performed in the studies involving human participants were in accordance with the ethical standards of the institutional research committee where the studies were conducted and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study and from their parents.