Takagi, Wei Han
Osako, Kiyomi
Machida, Shinji
Koitabashi, Kenichiro
Shibagaki, Yugo
Sakurada, Tsutomu http://orcid.org/0000-0003-2434-0483
Article History
Received: 22 June 2020
Accepted: 23 September 2020
First Online: 11 October 2020
Compliance with ethical standards
:
: All the authors have declared no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee at which the studies were conducted (IRB approval number 4344) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: This article does not contain any studies with animals performed by any of the authors.
: Informed consent was not necessary because of the retrospective nature of the study. Thus, the need for individual written informed consent was waived. However, a declaration of data was published on the website (ExternalRef removed. Accessed June 16, 2020). The study information was published on the internet, and thus, patients could use the Division of Graduate Student Affairs and Research promotion websites to opt-out of the study if they did not want their data used for research purposes.