Funding for this research was provided by:
Natural Science Foundation of Beijing Municipality (7202038)
Received: 4 January 2020
Accepted: 30 March 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: The study protocol was approved by the ethics committee at Anzhen Hospital (Institutional Review Board File 2019030X), and all experimental methods were performed in accordance with the relevant guidelines and regulations.
: Consent was obtained from the patients or their relatives.
: The authors have declared that no interest.