1. Veterinary Anesthesia Consultancy Services; Rua Cel. Mello de Oliveira; Sao Paulo Brazil
2. Department of Clinical Sciences; Faculty of Veterinary Medicine; University of Montreal; Saint Hyacinthe QC Canada
3. Comparative Pain Research Laboratory; Department of Clinical Sciences; Center for Comparative Medicine and Translational Research; College of Veterinary Medicine; North Carolina State University; Raleigh NC