Funding for this research was provided by:
National Natural Science Foundation of China (8140060989)
Founfation of Shanxi Province,China (2013011053-3)
Text and Data Mining valid from 2018-06-13
Received: 6 March 2018
Revised: 12 April 2018
Accepted: 7 May 2018
First Online: 13 June 2018
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of Shanxi Dayi Hospital, Taiyuan, Shanxi, China.
: All authors of this manuscript agreed to publication.
: The authors declare that they have no competing interests.
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