Funding for this research was provided by:
Technology Ministry of science and technology support program (2015BAK05B33)
Natural Science Foundation of Henan Province (HN2015HM066)
Science and technology project of Henan Province (2015HN15829)
Received: 13 September 2018
Accepted: 11 February 2019
First Online: 6 March 2019
Ethics approval and consent to participate
: Written informed consents were obtained from all patients; and, this study conformed to the principles of the Declaration of Helsinki was approved by the investigational review board of the Xinxiang Medical University.
: Not applicable
: The authors declare that they have no competing interests.
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