Funding for this research was provided by:
National Natural Science Foundation of China (30772215)
Academic Research of the Education Department of Liaoning Province (L2015313)
Project of Science and Technology of Liaoning Province (2015020340)
Received: 13 February 2018
Accepted: 3 April 2018
First Online: 4 June 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of The Affiliated Hospital of Jinzhou Medical University and conducted in accordance with the ethics principles described by the Declaration of Helsinki.
: The authors declare that they have no competing interests.
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