Funding for this research was provided by:
Natural Science Foundation of Hubei Province of China (2015CFB241)
Text and Data Mining valid from 2019-07-29
Received: 4 April 2019
Accepted: 20 June 2019
First Online: 29 July 2019
Compliance with ethical standards
: The authors declare that there is no conflict of interest.
: Approval of the present study was obtained from the Institutional Review Board of our hospital, and written informed consents were collected from all patients on the enrollment.
: All patients provided written informed consents.