Nanog expression and proliferation indices in canine cutaneous mast cell tumors - Joselevitch, Julia Antongiovanni; Barra, Camila Neri; Vargas, Thiago Henrique Moroni; Pulz, Lidia Hildebrand; Nishiya, Adriana Tomoko; Kleeb, Sílvia Regina; Xavier, José Guilherme; Catão-Dias, José Luiz; Strefezzi, Ricardo de Francisco (Veterinary Pathology, 2018)