Funding for this research was provided by:
Science and Technology Department of Jilin Provincial (20190201064JC)
Education Department of Jilin Province (Grant no. 2016480 and 2016273)
Received: 30 August 2019
Accepted: 16 July 2020
First Online: 25 July 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of PLA General Hospital. Informed consent forms for surgery were obtained from all the patients or their legal surrogates.
: Not applicable.
: All authors declare no conflict of interest.