Funding for this research was provided by:
National Research Foundation of Korea (2018R1A2B6003707)
Severance Hospital Research fund for Clinical excellence grant (C-2019-0015)
Received: 10 September 2020
Accepted: 18 March 2021
First Online: 31 March 2021
: The study was reviewed and approved by the Institutional Review Board of the Yonsei Cancer Center (IRB. 4–2017-1023) in accordance with the Declaration of Helsinki and the Guidelines for Good Clinical Practice.
: No relevant identifiable patient data.
: The authors report no conflict of interest.