Funding for this research was provided by:
333 High-level Talents Training Project of Jiangsu (BRA2019122)
Nanjing Medical University grant (2017NJMU123)
Received: 26 May 2020
Accepted: 22 July 2020
First Online: 28 July 2020
Ethics approval and consent to participate
: The study protocol was approved by the Research Ethics Committee of the Nanjing Medical University prior to study initiation. All the subjects provided written informed consent before any study procedures.
: Not applicable.
: The authors declare that they have no competing interests.