Funding for this research was provided by:
National Natural Science Foundation of China ((81402560)
Henan Medical Program (201602072)
Henan Science & Technology Program (172102310271)
Text and Data Mining valid from 2018-12-01
Received: 21 August 2018
Accepted: 20 November 2018
First Online: 11 December 2018
Ethics approval and consent to participate
: This study was approved by the Ethical Committees of the Second Military Medical University and Zhegnzhou University, and written informed consent was obtained from all participants. All study procedures were carried out in accordance with the ethical standards of the Helsinki Declaration.
: Not applicable.
: The authors declare that they have no conflicts of interest.
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