Funding for this research was provided by:
This study was supported by the Science and Technology Agency of Yiwu city, China (Grants#2018-3-76)
Text and Data Mining valid from 2020-03-06
Received: 14 December 2019
Accepted: 3 March 2020
First Online: 6 March 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 author declares that he has no competing interests.