Caprioli A, Martelli F, Ostanello F, Di Bartolo I, Ruggeri F M, Del Chiaro L, Tolari F
Department of Veterinary Public Health and Animal Pathology, Faculty of Veterinary Medicine, University of Bologna, via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy.
Vet Rec. 2007 Sep 22;161(12):422-3. doi: 10.1136/vr.161.12.422.