Yoshida, Masaaki
Yokokura, Shunji
Nishida, Takashi
Mochizuki, Kiyofumi
Suzuki, Takashi
Maruyama, Kazuichi
Otomo, Takaaki
Nishiguchi, Koji M.
Kunikata, Hiroshi
Nakazawa, Toru
Article History
Received: 31 July 2019
Accepted: 9 March 2020
First Online: 31 March 2020
Ethics approval and consent to participate
: The study was approved by the Institutional Review Boards (IRB) of Tohoku University Hospital (2017–1-553) and Gifu University Hospital (29–347) and was conducted in accordance with the tenets of the Declaration of Helsinki. The need for consent to participate was waived by the appropriate IRB as the study was retrospective. Instead of obtaining written informed consent, information on the purpose and implementation of the research was released on the website of Tohoku University Graduate School of Medicine and Gifu University School of Medicine. The IRBs of the facilities approved this procedure.
: In lieu of obtaining consent for publication from the subjects, identifying data, such as age and sex, were anonymized.
: Author Kazuichi Maruyama is an Editorial Board Member for the BMC Series.