Singh A K, Gupta S, Barnes A, Carlson J M, Ayers J K
Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, St Paul, MN 55108, USA.
J Vet Pharmacol Ther. 2007 Apr;30(2):175-8. doi: 10.1111/j.1365-2885.2007.00828.x.