Katayama, Taiga
Hioki, Hirofumi http://orcid.org/0000-0001-7189-8450
Kyono, Hiroyuki
Watanabe, Yusuke
Yamamoto, Hirosada
Kozuma, Ken
Article History
Received: 7 October 2019
Accepted: 10 January 2020
First Online: 22 January 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 research committee (Teikyo Academic Research Center; reference number, 17-088) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Given the retrospective nature of the study, the requirement for informed consent was waived.