Funding for this research was provided by:
Beijing Municipal Administration of Hospitals (DFL20150101)
The Capital Research Project of Specialty Clinical Application (Z181100001718220)
Research Foundation of Beijing Friendship Hospital, Capital Medical University (yyqdkt2017-27)
Received: 20 February 2020
Accepted: 16 June 2020
First Online: 19 June 2020
Ethics approval and consent to participate
: Data collection and analysis were performed according to the ethical standards of the Helsinki Declaration. The study was approved by the Ethical Committee of Beijing Friendship Hospital, Capital Medical University (Approval ID: 2019-P2–154-01).
: Not applicable.
: The authors declare that they have no competing interests.