Article History
Received: 23 April 2020
Revised: 20 October 2020
Accepted: 13 November 2020
First Online: 21 November 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study protocol was approved by the Ethics Committee of Peking University First Hospital and waived the patient consent requirement.
: Not applicable.
: Not applicable.
: Not applicable.