Funding for this research was provided by:
National Key Research and Development Program of China (2016YFC1000703, 2016YFC1000700)
Text and Data Mining valid from 2018-08-25
Received: 27 March 2018
Accepted: 13 August 2018
First Online: 25 August 2018
Ethics approval and consent to participate
: The study was approved by the Ethics committee of Third Affiliated Hospital of Zhengzhou University, where it was conducted. Each patient signed informed consent prior to study enrollment.
: All the participants accepted with the initial written informed consent the possibility that the results of this study could be published.
: The authors declare that they have no competing interests.
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