1. Clinica Veterinaria Adriatica (Leone), Senigallia, SS Adriatica Nord 50/1-2, 60019 Senigallia, Italy
2. The Department of Clinical Studies (Cerundolo), School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6010
3. Ambulatorio Veterinario Associato (Vercelli), Corso Traiano 99d, 10135 Torino, Italy; and the
4. Department of Veterinary Clinical Sciences (Lloyd), Royal Veterinary College, University of London, North Mymms, Hatfield, Herts, AL9 7TA, England
5. From the