Funding for this research was provided by:
National Natural Science Foundation of China (81372497)
Program for Liaoning Excellent Talents in University (LR2015067)
Received: 13 December 2018
Accepted: 15 January 2019
First Online: 25 January 2019
Ethics approval and consent to participate
: This research was approved by the Human Research Ethics Committee of China Medical University, which is accredited by the National Council on Ethics in Human Research.
: All authors have agreed to publish this manuscript.
: The authors declare that they have no competing interests.
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