Funding for this research was provided by:
the Natural Science Foundation of Henan Provincial People's Hospital
Article History
Received: 9 December 2019
Accepted: 24 June 2020
First Online: 23 July 2020
Ethics approval and consent to participate
: Our survey was conducted by and obtained the approval of the Medical College Review Board of Henan Provincial People’s Hospital.
: We all consent to publication.
: The authors announce that there are no competing interests.