Matrix metalloproteinase 9 expression in canine cutaneous mast cell tumors - Pulz, Lidia Hildebrand; Xavier, J. G; Kleeb, Sílvia Regina; Catão-Dias, José Luiz; Fukumasu, Heidge; Strefezzi, Ricardo de Francisco (Annual Meeting of the American College of Veterinary Pathologists and American Society for Veterinary Clinical Pathology, 2012)