Funding for this research was provided by:
National Natural Science Foundation of China (81260215)
Natural Science Foundation of Guangxi Province (2012GXNSFAA053142)
Received: 24 February 2019
Accepted: 24 July 2019
First Online: 8 August 2019
Ethics approval and consent to participate
: The experiments are in accordance with the Ethical Standards for Investigation of Experimental Pain in Animals. All animal experiments were approved by the ethics committee of the First Affiliated Hospital of GuangXi Medical University, China (No. KY-055,2012).
: Not applicable.
: The authors declare that they have no competing interests.