Article History
Received: 29 April 2021
Accepted: 28 December 2021
First Online: 31 December 2021
Declarations
:
: This study was based on publicly available data from the SEER database. The study used de-identified data and did not require informed consent for SEER registration. Therefore, no formal ethics approval was required in this study. The author obtained a “limited use data agreement” from SEER before conducting this study.
: Not applicable.
: The authors declare that they have no competing interests and no relationship with the industry.