Funding for this research was provided by:
Key Research and Development Plan-Social Development Area of Shaanxi Province (2018SF_156)
research grant of the First Affiliated Hospital of Xi’an Jiaotong University (2017QN-16)
Received: 21 August 2019
Accepted: 26 June 2020
First Online: 9 July 2020
Ethics approval and consent to participate
: The present study was approved by the Research Ethic Committee at the First Affiliated Hospital of Xi’an Jiaotong University (Xi’an, Shaanxi, China). Since this study was a retrospective analysis of anonymous data, signed informed consent to participate was waived by the committee.
: Not Applicable.
: The authors declare that they have no competing interests.