Funding for this research was provided by:
Natural Science Foundation of Shaanxi Province (2018JM7090)
Scientific Research Plan Projects of the Shaanxi Education Department (19JK0765)
Received: 26 June 2020
Accepted: 2 January 2021
First Online: 17 February 2021
Ethics approval and consent to participate
: Patients recruited have signed the informed consent. This study met the requirement of the Declaration of Helsinki and was approved by the Ethics Committee of the First Affiliated Hospital of Xi’an Medical University.
: All the authors listed have approved the manuscript that is enclosed.
: All the authors declared no conflicts of interest.