Funding for this research was provided by:
Major Research Plan (81773499)
Young Scientists Fund (81703273)
Basic Research Program of Jiangsu Province (BK20171054)
Received: 6 March 2019
Accepted: 16 September 2019
First Online: 15 October 2019
Ethics approval and consent to participate
: This study was given permission by the medical ethics committee of Nanjing Medical University. All subjects had signed agreements on the informed consent materials to participate in this study.
: Not applicable.
: The authors declare that they have no competing interests.