1. P Cavana:
Department of Veterinary Sciences, University of Turin,Largo P. Braccini 2, 10095 Grugliasco, Turin,Italy
2. A Iuliano:
Department of Veterinary Sciences, University of Turin,Largo P. Braccini 2, 10095 Grugliasco, Turin,Italy
3. G Cagnotti:
Department of Veterinary Sciences, University of Turin,Largo P. Braccini 2, 10095 Grugliasco, Turin,Italy