Funding for this research was provided by:
the National Natural Science Foundation (81371983)
the Youth Science and Technology Foundation of Gansu Province (GSWSKY2018-21)
Natural Science Foundation of Shaanxi Province (2020JM-339)
Received: 27 July 2020
Accepted: 23 September 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: This study was approved by the Medical Ethics Committee (The 940th Hospital of PLA Joint Logistics Support Force, No. 2006KYLL012). Informed consent was obtained from all individuals who participated in the study. This study was performed in accordance with the Declaration of Helsinki as revised in 2008 and was authorized by the ethical committee of our institution. All patients provided informed consent to participate in this study.
: Not applicable, as no identifying personal information is included in this manuscript.
: The authors declare that they have no competing interests.