Funding for this research was provided by:
the Twelfth Five-Year Project on Tackling Key Problems of National Science and Technology (2012ZX10001002-002-013)
National Natural Science Foundation of China (81171619)
Received: 14 November 2017
Accepted: 1 November 2018
First Online: 15 November 2018
Ethics approval and consent to participate
: This research was approved by the Ethics Committee of the first Affiliated Hospital of China Medical University. All participants signed informed consent statements.
: Not applicable.
: The authors declare that they have no competing interests.
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