Funding for this research was provided by:
Scientific and Technological Project of Henan Province (201502017)
Text and Data Mining valid from 2019-07-04
Received: 14 February 2019
Accepted: 22 May 2019
First Online: 4 July 2019
Ethics approval and consent to participate
: This study was approved by Ethics Committee of Huaihe Hospital of Henan University and all subjected provided written consent.
: Not applicable.
: The authors declare that they have no competing interests.