Funding for this research was provided by:
National Key R&D Program of China (2018YFC2001800)
Received: 21 February 2020
Accepted: 8 June 2020
First Online: 12 June 2020
Ethics approval and consent to participate
: The study protocol was approved by the Clinical Research Ethics Committee of Peking University First Hospital (No. 2016–1062 and 2018–47). The ethics committee agreed to exempt written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.