Received: 31 December 2021
Accepted: 10 March 2022
First Online: 21 March 2022
: According to the guidelines of the KBCR database, we obtained permission to use the data for this study from the Korean Breast Cancer Society. This study was approved by the Institutional Review Board of The Catholic University of Korea, Uijeongbu St. Mary’s Hospital (UC21RISI0120).
: Not applicable.
: The authors have no conflicts of interest.