Funding for this research was provided by:
National Natural Science Foundation of China (81371983)
the Military Logistics Research Project (CWH17J009)
the Military Medical Science and Technology Youth Development Program (19QNP047)
the Youth Science and Technology Foundation of Gansu Province (1606RJYA300)
the Health Industry Research Plan Project of Gansu Province (GSWSKY2018-21)
the Natural Science Foundation of Gansu Province (1606RJZA208)
Text and Data Mining valid from 2019-08-29
Received: 30 May 2019
Accepted: 19 August 2019
First Online: 29 August 2019
Ethics approval and consent to participate
: This study was performed in accordance with the Declaration of Helsinki as revised in 2008 and was authorized by the Ethics Committee of General Hospital of Lanzhou Military Command (no. 2012KYLL005). All patients or their families signed the informed consent form before surgery and provided consent to publish and report individual clinical data.
: Not applicable.
: The authors declare that they have no competing interests.