Funding for this research was provided by:
National Natural Science Foundation of China (81400851, 81170543, 81571440)
Foundation of Liaoning Educational Committee (LZDK201703)
Received: 13 July 2018
Accepted: 21 November 2018
First Online: 14 December 2018
Ethics approval and consent to participate
: This study was approved and supervised by the Research Ethics Committee of China Medical University, Shenyang, China.
: Not applicable.
: The authors declare that they have no competing interests.
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