Funding for this research was provided by:
National Natural Science Foundation of China (81800214)
Natural Science Foundation of Anhui Province (1808085QH236)
Received: 18 May 2020
Accepted: 28 September 2020
First Online: 7 October 2020
Ethics approval and consent to participate
: The study was approved by the Institutional Ethical Review Board of Tianjin First Center Hospital. The need for patient consent was waived due to the retrospective study design.
: Not applicable.
: The authors declare that they have no competing interests.