Funding for this research was provided by:
Japanese Association of Medical Sciences (150-2019-3-05)
Japan Society for the Promotion of Science (JP20K16741)
Received: 25 September 2019
Accepted: 3 June 2020
First Online: 9 June 2020
Ethics approval and consent to participate
: All procedures involving human participants were in accordance with the ethical standards of the institutional research committee, and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This retrospective observational study was approved by ethics committee, Aichi Medical University School of Medicine in Japan (application number 2018-H211). This study was also examined and approved by Aichi Cancer Center Hospital, Toyota Memorial Hospital, and Aoyama Hospital, Japan. The study was conducted in accordance with the tenets of the Declaration of Helsinki and its subsequent amendments. Written informed consent was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.