Kato, Motoyasu http://orcid.org/0000-0002-3217-5118
Yamada, Tomoko
Kataoka, Shunichi
Arai, Yuta
Miura, Keita
Ochi, Yusuke
Ihara, Hiroaki
Koyama, Ryo
Sasaki, Shinichi
Takahashi, Kazuhisa
Article History
Received: 7 August 2019
Accepted: 25 November 2019
First Online: 18 December 2019
Ethics approval and consent to participate
: The study protocol was approved by Juntendo University’s ethics committee (number 19–015). The ethics committee waived the requirement for informed consent because of the retrospective nature of the research.
: Not applicable.
: The authors declare that they have no competing interests.