Donaldson M T, Beech J, Ennulat D, Hamir A N
Department of Clinical Studies and Pathology at New Bolton Center, School of Veterinary Medicine, University of Pennsylvania, Kennett Square 19348, USA.
Equine Vet J. 1998 Mar;30(2):173-5. doi: 10.1111/j.2042-3306.1998.tb04480.x.