Kakimoto, Soichiro http://orcid.org/0000-0002-2314-984X
Miyamoto, Morikazu http://orcid.org/0000-0003-4763-0926
Einama, Takahiro http://orcid.org/0000-0002-4434-0803
Matsuura, Hiroko http://orcid.org/0000-0002-1825-6245
Iwahashi, Hideki http://orcid.org/0000-0002-0139-2283
Ishibashi, Hiroki http://orcid.org/0000-0002-8745-6160
Sakamoto, Takahiro http://orcid.org/0000-0003-3107-5016
Hada, Taira
Takano, Masashi http://orcid.org/0000-0001-6916-9398
Article History
Received: 1 January 2020
Accepted: 14 May 2020
First Online: 28 May 2020
Compliance with Ethical Standards
: All procedures performed in the studies involving human participants 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. Since this was a retrospective study, informed consent was not obtained. This study was approved by the Ethics Committee of the National Defense Medical College, Tokorozawa, Japan.
: The authors declare that they have no conflict of interest.