Takenami, Tsutomu
Maeda, Shimpei https://orcid.org/0000-0001-9344-6527
Karasawa, Hideaki
Suzuki, Takashi
Furukawa, Toru
Morikawa, Takanori
Takadate, Tatsuyuki
Hayashi, Hiroki
Nakagawa, Kei
Motoi, Fuyuhiko
Naitoh, Takeshi
Unno, Michiaki
Article History
Received: 28 May 2018
Accepted: 28 March 2019
First Online: 5 April 2019
Ethics approval and consent to participate
: This study was approved by the Ethics committee of Tohoku University Graduate School of Medicine (Approval No: 2016–1-747). The requirement of informed consent was waived and an opt-out method was used due to the retrospective design of the study.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.