Received: 12 January 2020
Accepted: 19 August 2020
First Online: 26 August 2020
Ethics approval and consent to participate
: All data in this study was publicly available in the SEER database.
: Not applicable.
: I would like to declare on behalf of my co-authors that this article was original and all the authors listed have approved the manuscript that is submitted. No conflict of interest exists in the submission of this manuscript.