Maehana, Takeshi http://orcid.org/0000-0003-2687-1923
Ichihara, Koji
Takahashi, Satoshi
Takahashi, Yusuke
Hashimoto, Kohei
Tanaka, Toshiaki
Masumori, Naoya
Article History
Received: 1 December 2020
Accepted: 31 May 2021
First Online: 7 June 2021
Declarations
:
: The authors have declared that no conflict of interest exists.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee at which the studies were conducted (approval no. 272-96) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Since this was an observational, but not prospective, intervention study, the Ethics Committee provided a waiver of written informed consent. We announced the commencement of this study on our website (ExternalRef removed) with the proviso that the patients who participated in this study could withdraw later.