Funding for this research was provided by:
Science and Technology Commission of Shanghai Municipality (17ZR1404900)
Shanghai Municipal Health Commission (2019LJ15)
Article History
Received: 22 April 2021
Accepted: 10 August 2021
First Online: 28 August 2021
Declarations
:
: All the data were accessed from the public SEER database and no ethical approval was required.
: Not applicable
: The authors declare that they have no competing interests.