Funding for this research was provided by:
the Science and Technology Agency of Yiwu city, China (Grants#2018-3-76)
Received: 26 April 2020
Accepted: 16 June 2020
First Online: 22 June 2020
Ethics approval and consent to participate
: The study protocol was reviewed and approved by the Institutional Ethical Review Board of Yiwu Central Hospital in Yiwu, Zhejiang, China. Informed consent was obtained from all participants.
: Informed patient consent was obtained in writing.
: The authors declare that they have no competing interests.