1. Equine Infectious Disease Laboratory, Department of Large Animal Clinical Sciences College of Veterinary Medicine & Biomedical Sciences, Texas A&M University College Station Texas USA
2. Department of Medicine Brigham & Women's Hospital, Harvard Medical School Boston Massachusetts USA
3. 6666 Ranch Guthrie Texas USA
4. Lazy E Ranch Guthrie Oklahoma USA
5. Rood & Riddle Equine Hospital in Saratoga Saratoga Springs New York USA
6. Rood & Riddle Equine Hospital Lexington Kentucky USA
7. Granada Farms Wheelock Texas USA
8. Mg Biologics, Inc Ames Iowa USA