Received: 20 February 2020
Accepted: 10 September 2020
First Online: 27 October 2020
Ethics approval and consent to participate
: Ethics approval was granted by the Institutional Review Board (IRB) of Peking Union Medical College Hospital (PUMCH). The IRB approval number for this study is S-K912.
: Not applicable.
: The authors declare that they have no competing interests to disclose.