Ritmeester A M, Denicola D B, Blevins W E, Christian J A
Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Purdue University, West Lafayette, Indiana 47907, USA.
Equine Vet J. 1997 Mar;29(2):151-2. doi: 10.1111/j.2042-3306.1997.tb01658.x.