Funding for this research was provided by:
Not applicable (Not applicable)
Received: 16 February 2019
Accepted: 10 October 2019
First Online: 4 November 2019
Ethics approval and consent to participate
: Authors declared that all experiments were carried out with strict compliance to The “Principle of Laboratory Animal Care” (NIH Publication No. 85–23) and ethical guidelines for investigation of experimental pain in conscious animals.
: Not applicable
: The authors declare that they have no competing interests.