1. Department of Wildlife and Fisheries Sciences, Texas A&M University, TAMU-2258, College Station, Texas 77843-2258, USA
2. Texas Veterinary Medical Diagnostic Laboratory System, P.O. Drawer 3040, College Station, Texas 77841-6040, USA
3. Texas Parks and Wildlife Department, P.O. Box 659, 5900 Cemetery Road, Canyon, Texas 79015, USA