Funding for this research was provided by:
Fudan University (SZ2019-03; 2019; 2018A015)
Fudan’s Undergraduate Research Opportunities Program
Received: 30 October 2019
Accepted: 13 January 2020
First Online: 28 January 2020
Ethics approval and consent to participate
: The research was approved by Fudan University Research Ethics Committee (2017-C017). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.