Doherty T J, Geiser D R, Frazier D L
Department of Large Animal Clinical Sciences, University of Tennessee, College of Veterinary Medicine, Knoxville 37910-1071, USA.
J Vet Pharmacol Ther. 1997 Oct;20(5):408-10. doi: 10.1046/j.1365-2885.1997.00086.x.