Received: 30 April 2018
Accepted: 17 May 2019
First Online: 19 June 2019
Ethics approval and consent to participate
: The animal experiment design got the permission from the experimental animal ethics committee of our hospital, and all the research behaviors for the experimental animals strictly complied with the relevant animal protection and use regulations issued by International Association for the Study of Pain.
: Not applicable.
: The authors declare that they have no competing interests.
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