Text and Data Mining valid from 2018-04-05
Received: 23 December 2017
Accepted: 27 March 2018
First Online: 5 April 2018
: All procedures followed were in accordance with the Declaration of Helsinki. All experimental protocols were approved by the Ethics Committee of First Hospital Affiliated to Nanhua University in Hunan, China.
: Not applicable.
: The authors declare that they have no competing interests.
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