Funding for this research was provided by:
Japan Society for the Promotion of Science (20K18921)
National Cancer Center Research and Development Fund (30-A-17)
Received: 28 September 2020
Accepted: 11 January 2021
First Online: 22 February 2021
Ethics approval and consent to participate
: This review article was a study that did not require ethical approval.
: Not applicable.
: The authors declare that EO and KT have no conflicts of interest associated with this manuscript. YM has received speaker fees from Suntory, Pfizer, Mochida, Eli Lilly, and NTT Data, is conducting collaborative research with SUSMED, and has received a grant from SENSHIN Medical Research Foundation.