Funding for this research was provided by:
National Natural Science Foundation of China (71403004)
Received: 17 April 2018
Accepted: 18 October 2018
First Online: 8 November 2018
Ethics approval and consent to participate
: The study design and implementation were approved by the Anhui Medical University Research Ethics Committee.
: Not applicable.
: The authors declare that they have no competing interests.
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