Funding for this research was provided by:
the National Clinical Key Specialty Construction Projects (ZDZK11)
the Key projects of Science and Technology Fund supported by Tianjin Municipal Health and Health Committee (14KG132, 15KG132)
the 13th Five Years Clinical Key Disciplines of Tianjin (ZDPY-12)
Article History
Received: 14 September 2021
Accepted: 10 January 2022
First Online: 23 January 2022
Declarations
:
: The authors declare that they have no conflict of interest in the work.<b>Ethical approval</b>Ethics approval and patient written informed consent were not required because all analyses in our study were mainly performed based on data from the SEER database.
: Not applicable.