Funding for this research was provided by:
Beijing Medical and Health Foundation (MH180924)
National Clinical Key Specialty Project Foundation
Received: 10 March 2020
Accepted: 30 July 2020
First Online: 6 August 2020
Ethics approval and consent to participate
: The Ethics Committee of Chaohu Hospital of Anhui Medical University (No. 201903-kyxm-02) and each participating hospitals approved this study.
: Not applicable.
: The authors declare that they have no competing interests.