Prognostic evaluation of mast cell tumor (MCT) in dogs, using design-based stereological tools. A preliminary communication - Matera, Júlia Maria; Casagrande, Thais Andrade Costa; Ladd, Fernando Vagner Lobo; Melo, S. R; Barros, L. M. O; Carneiro, Carolina Scarpa; Ribeiro, Antonio Augusto Coppi Maciel; Matera, Júlia Maria (Annual Congress of the European Society of Veterinary Oncology, 2010)