Kojima, Shinya http://orcid.org/0000-0001-6199-9784
Shinohara, Hiroyuki
Hashimoto, Takeyuki
Suzuki, Shigeru
Article History
Received: 17 February 2018
Revised: 26 July 2018
Accepted: 27 July 2018
First Online: 4 August 2018
Compliance with ethical standards
:
: All procedures involving human participants were in accordance with the ethical standards of the Institutional Review Board (IRB) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The IRB waived the requirement for patients’ informed consent. This study does not involve any experiments involving animals.
: The requirement for informed consent was waived by the institutional review board because of the retrospective nature of the analysis.
: The authors declare that they have no conflict of interest in this article.