1 Department of Small Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA 30602- 7390.
| 2 Department of Small Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA 30602- 7390.
| 3 Present address is Dallas Veterinary Surgical Center, 4444 Trinity Mills, No. 203, Dallas, TX 75827.
| 4
| 5 Department of Small Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA 30602- 7390.
| 6 Present address is Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37901-1071.