Takahashi, Toshiyuki
Okamoto, Takayuki http://orcid.org/0000-0002-6029-451X
Sato, Yasuyuki
Hayashi, Asako
Ueda, Yasuhiro
Ariga, Tadashi
Article History
Received: 15 June 2019
Revised: 13 August 2019
Accepted: 6 September 2019
First Online: 16 January 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures were performed in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments. This study was approved by the Research Ethics Committee of Hokkaido University Hospital.
: Informed consent was obtained from all patients and their parents before study participation began.