Funding for this research was provided by:
National Natural Science Foundation of China (71804036, 71333003)
Natural Science Foundation of Heilongjiang Province (YQ2019G003)
Received: 25 June 2019
Accepted: 23 December 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: Ethical approval for this investigation was obtained from the Medical Ethics Committee, Harbin Medical University.
: Not applicable.
: The authors declare that they have no competing interests.