Ogawa, Kento http://orcid.org/0000-0002-8602-2571
Shirai, Kokoro
Nozaki, Shoko
Shikimoto, Ryo
Sawada, Norie http://orcid.org/0000-0002-9936-1476
Mimura, Masaru
Iso, Hiroyasu http://orcid.org/0000-0002-9241-7289
Tsugane, Shoichiro http://orcid.org/0000-0003-4105-2774
,
Article History
Received: 17 October 2021
Revised: 18 February 2022
Accepted: 25 February 2022
First Online: 11 April 2022
Competing interests
: The authors declare no competing interests.
: The Institutional Review Boards of the National Cancer Centre of Japan, Osaka University, and the Keio University School of Medicine approved this study. We conducted this research according to the protocol and the STROBE (Strengthening the Reporting of Observational Studies in Epidemiology) statement [CitationRef removed]. The authors assert that all procedures contributing to this work comply with the ethical standards of the relevant national and institutional committees on human experimentation and with the Helsinki Declaration of 1975, as revised in 2013. The protocol of this study was approved by the ethical review board of Osaka University, Osaka, Japan. Since the registry data were already anonymous, the review board waived informed consent.