Funding for this research was provided by:
the Youth Fund Project of the First Affiliated Hospital of Xinxiang Medical University (QN-2017-B009)
Text and Data Mining valid from 2019-09-09
Received: 11 July 2019
Accepted: 5 September 2019
First Online: 9 September 2019
Compliance with ethical standards
: The authors have no conflict of interest to declare.
: This study was reviewed and approved by the Ethics committee of the First Affiliated Hospital of Xinxiang Medical University.
: All patients provided written informed consent according to the local ethics committee regulations.