Funding for this research was provided by:
Beijing Municipal Administration of Hospital’s Ascent Plan (DFL20181104)
Article History
Received: 1 April 2020
Accepted: 25 June 2020
First Online: 29 June 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures described herein were performed in accordance with the ethical standards of the institutional and national research committee and with the Helsinki Declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained.