Funding for this research was provided by:
Beijing Municipal Administration of Hospitals Clinical Medicine Development of Special Funding Support (ZYLX201702)
Article History
Received: 15 September 2020
Revised: 30 November 2020
Accepted: 8 December 2020
First Online: 8 January 2021
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.