Funding for this research was provided by:
This study was supported by the Science and Technology Agency of Yiwu City, China (Grant #2019-3-119)
Text and Data Mining valid from 2019-12-01
Received: 5 September 2019
Accepted: 3 December 2019
First Online: 18 December 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Ethical Review Board of Yiwu Central Hospital (Yiwu, Zhejiang, China). Informed consent was obtained from all study participants or their parents.
: Written informed patient consent was obtained.
: The authors have no competing interests to declare.