Funding for this research was provided by:
Shanxi Provincial Key Research and Development Project (No.201803D31139)
Text and Data Mining valid from 2019-10-15
Received: 13 January 2019
Accepted: 24 September 2019
First Online: 15 October 2019
Ethics approval and consent to participate
: The study was approved by the Shanxi DaYi Hospital institutional review board (China). All participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.