Article History
Received: 11 October 2021
Accepted: 19 January 2022
First Online: 5 February 2022
Declarations
:
: The study protocol was reviewed and approved by the institutional review board of the National Cancer Center in Korea (NCC2018-0193). Because of the retrospective nature of this study, individual consent for study inclusion was exempted.
: The manuscript is approved by all authors for publication.
: The authors declare that they have no competing interests.