Funding for this research was provided by:
the Postgraduate Education Reform Foundation of Chongqing (yjg183134)
the Postgraduate Education Reform Foundation for the Army Medical University (2018yjgB019)
the Outstanding Talent Pool Training Program of The Third Military Medical University
Received: 15 June 2020
Accepted: 4 August 2020
First Online: 12 August 2020
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were conducted in accordance with the ethical standards of the local institutional research committee, the 1964 Helsinki declaration and the declaration’s later amendments or comparable ethical standards. Written informed consent was obtained from all individual participants in the study.
: Not applicable.
: The authors declare that they have no competing interests.