M. Keith ChaffinDepartment of Large Animal Medicine and Surgery, Texas Veterinary Medical Center, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843-4475.
William C. McMullanDepartment of Large Animal Medicine and Surgery, Texas Veterinary Medical Center, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843-4475.
David G. SchmitzDepartment of Large Animal Medicine and Surgery, Texas Veterinary Medical Center, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843-4475.