Funding for this research was provided by:
a grant from the Science and Technology Department of Sichuan Province, China (Joint Research Fund, No. 2019YFH0056)
Received: 24 April 2022
Accepted: 18 October 2022
First Online: 2 November 2022
: Considering that SEER is a public database from which anyone can access data, and private patient information is not identifiable, informed consent of patients or ethical approval is not required.
: The authors declare that they have no competing interests.