Doherty T J, Geiser D R, Rohrbach B W
Department of Large Animal Clinical Sciences, University of Tennessee, College of Veterinary Medicine, Knoxville 37901-1071, USA.
J Vet Pharmacol Ther. 1997 Jun;20(3):246-8. doi: 10.1111/j.1365-2885.1997.tb00104.x.