Funding for this research was provided by:
National Natural Science Foundation of China (U1604172)
the Science and Technology Colleges Innovation Team Support Program of Henan Province (18IRTSTHN024)
the Science and Technology Planning Project of Henan Province co-established by the province and the ministry (201701002)
Text and Data Mining valid from 2019-10-15
Received: 4 January 2019
Accepted: 25 September 2019
First Online: 15 October 2019
Ethics approval and consent to participate
: The protocols were approved by the Ethics Committee of The First Affiliated Hospital of Zhengzhou University. All patients signed informed consent.
: The study was undertaken with the patient’s consent.
: The authors declare that they have no competing interests.