Funding for this research was provided by:
National Natural Science Foundation of China (91746205, 81673166, 81903302)
China Postdoctoral Science Foundation (2018M641753)
Received: 11 August 2019
Accepted: 20 December 2019
First Online: 13 January 2020
Ethics approval and consent to participate
: The protocol of this study was approved by the Institutional Review Board of the Tianjin Medical University and participants gave written informed consent before participation in the study.
: Not applicable.
: The authors declare that they have no competing interests.