Valfrè F, Moretti V M
Department of Veterinary Sciences and Technology for Food Safety, Faculty of Veterinary Medicine, University of Milan, via Celoria 10, 20134 Milan, Italy.
Vet Res Commun. 2003 Sep;27 Suppl 1:57-62. doi: 10.1023/b:verc.0000014118.30278.ad.