Scarratt W K, Moon M L, Sponenberg D P, Feldman B
Department of Large Animal Clinical Sciences, Virginia-Maryland Regional College of Veterinary Medicine, Virginia Tech, Blacksburg 24061, USA.
Equine Vet J. 1998 Jan;30(1):85-8. doi: 10.1111/j.2042-3306.1998.tb04094.x.