Inokuchi, Mikito http://orcid.org/0000-0001-7321-848X
Kumamaru, Hiraku
Nakagawa, Masatoshi
Miyata, Hiroaki
Kakeji, Yoshihiro
Seto, Yasuyuki
Kojima, Kazuyuki
Article History
Received: 26 March 2019
Accepted: 15 July 2019
First Online: 22 July 2019
Compliance with ethical standards
:
: Hiraku Kumamaru and Hiroaki Miyata are affiliated with the Department of Healthcare Quality Assessment at the University of Tokyo. The department is a social collaboration department that is supported by grants from the National Clinical Database, Johnson & Johnson K.K., and Nipro Co.
: All procedures were conducted in accordance with the ethical standards of the respective national committees on human experimentation and with the Helsinki Declaration. The use of data from the registry for retrospective observational studies was approved by The Japanese Society of Gastroenterological Surgery committee and the Institutional Review Board of Tokyo Medical and Dental University committee. Individual written informed consent was waived because of the retrospective design.
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