Funding for this research was provided by:
Department of Education of Liaoning Province (LR201605)
Article History
Received: 21 August 2017
Accepted: 19 June 2018
First Online: 13 July 2018
Ethics approval and consent to participate
: All subjects provided written informed consents and the study procedures were approved by the Committee on Human Experimentation of China Medical University.
: Not applicable.
: The authors declare that they have no competing interests.
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