Funding for this research was provided by:
National Natural Science Foundation of China (81573255)
Received: 27 March 2019
Accepted: 5 November 2019
First Online: 12 November 2019
Ethics approval and consent to participate
: Institutional Research Board of Harbin Medical University approved the study and written informed consent was obtained from all individual participants included in the study.
: Not applicable.
: The authors declare that they have no competing interests.