Text and Data Mining valid from 2019-09-02
Received: 11 June 2019
Accepted: 22 August 2019
First Online: 2 September 2019
Ethics approval and consent to participate
: Informed consent was obtained from all individual participants included in the study. The ethical review committee of the Cancer Institute Hospital of Japanese Foundation for Cancer Research approved this study protocol (No.2018–1222).
: Not applicable.
: The authors declare that they have no competing interests.