Castro A M M G, Cortez A, Ruiz V L A, Leomil H, Moreno A M, Doto D S, Richtzenhain L J
Department of Preventive Veterinary Medicine and Animal Health, University of São Paulo, São Paulo, 05508-900, Brazil.
Vet Rec. 2004 Jun 5;154(23):728-9. doi: 10.1136/vr.154.23.728.