Funding for this research was provided by:
Innovation Research Group in Colleges and Universities Program of Chongqing Municipal Education Commission (CXQT20012)
Postgraduate Tutor Team Development Program of Chongqing Municipal Education Commission (dstd201807)
Received: 3 August 2021
Accepted: 7 April 2022
First Online: 18 April 2022
Change Date: 17 May 2022
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/S12876-022-02306-W
: As the data used was from SEER which is an open public database, the present study was exempt from the ethical review of the ethics board of the First Affiliated Hospital of Chongqing Medical University. The present study complied with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no conflicts of interest.