Kim, Hyun Beom https://orcid.org/0000-0001-6565-0854
Lee, In Joon https://orcid.org/0000-0002-5779-5153
Kim, Seong Hoon https://orcid.org/0000-0001-7921-1801
Kang, Beomsik https://orcid.org/0000-0003-0629-5682
Woo, Sang Myung https://orcid.org/0000-0003-3786-4403
Lee, Woo Jin https://orcid.org/0000-0003-2115-6701
Article History
Received: 1 February 2021
Accepted: 13 March 2021
First Online: 22 April 2021
Declarations
:
: None of the authors has any conflict to disclose.
: The protocol conformed to ethical guidelines of the World Medical Association Declaration of Helsinki and was approved by the Institutional Review Board of the National Cancer Center (No. NCC2021-0017).
: The requirement for informed consent from patients was waived owing to the retrospective nature of the study.