Funding for this research was provided by:
the Science and Technology Research and Development Project of Handan (1823208029ZC)
the Key Science and Technology Research Program of Hebei Provincial Department of Health (20190962)
Text and Data Mining valid from 2019-09-23
Received: 19 June 2019
Accepted: 13 September 2019
First Online: 23 September 2019
Ethics approval and consent to participate
: This study was approved by the Ethical Committee of Affiliated Hospital of Hebei University of Engineering. The written informed consents were obtained from all the patients.
: Not applicable.
: The authors declare that they have no competing interests.