1. Laboratory of Pharmacology of PainDepartment of PharmacologyInstitute of Basic Health Sciences (ICBS)Federal University of Rio Grande do Sul (UFRGS)90050‐170Porto AlegreRSBrazil
2. Post Graduate Program in Biological SciencesPhysiology, ICBS, UFRGS90050‐170Porto AlegreRSBrazil
3. Research and Post Graduate Group of Hospital de Clínicas de Porto Alegre (HCPA)/Animal Experimental Unit90035‐003Porto AlegreRSBrazil
4. Faculty of PharmacyCentro Universitário UNIVATES95900‐000LajeadoRSBrazil