1. Veterinary Practitioner, Via Cassia 829, 00189 Rome, Italy
2. Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, National Reference Center of Veterinary and Comparative Oncology (CEROVEC), Piazza Borgo Pila 29/34, 16129 Genova, Italy
3. Veterinary Practitioner, Via San Manno 19, 03024 Cepranno, Italy
4. U.O.C. Anatomia Patologica, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy
5. Azienda Usl Toscana-Ovest, UOC Ostetricia e Ginecologia, Ospedale Apuane, 54100 Massa, Italy
6. Faculty of Veterinary Medicine, University of Teramo, 64100 Teramo, Italy