Ikeda, Takamitsu http://orcid.org/0000-0002-1245-2958
Orii, Ryo
Iwakiri, Masaki
Uchida, Kanji
Yamada, Yoshitsugu
Article History
Received: 31 March 2020
Accepted: 17 July 2020
First Online: 23 July 2020
Compliance with ethical standards
:
: The authors declare that they have no competing interests.
: This investigation was approved by the institutional review board of the University of Tokyo [#2203-(6)]. Informed consent was obtained in advance from all surgery patients for use of data for scientific research, including publication of deidentified patient data.