Hamir A N, Galligan D T, Egel J G, Manzell K L, Niu H S, Rupprecht C E
Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, New Bolton Center, Kennett Square 19348, USA.
J Vet Diagn Invest. 1995 Oct;7(4):580-2. doi: 10.1177/104063879500700436.