Arai, Nobuhiko
Mizutani, Katsuhiro
Horiguchi, Takashi
Akiyama, Takenori
Takahashi, Satoshi
Yanagisawa, Kaoru
Koike, Kazunari
Yoshida, Kazunari
Article History
Received: 12 February 2020
Accepted: 13 March 2020
First Online: 16 April 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (Keio University ethical committee) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.