1. Department of Clinical Sciences and College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA.
2. Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, USA.
3. Department of Statistics, College of Arts and Sciences, Kansas State University, Manhattan, Kansas, USA.
4. Department of Animal Sciences and Industry, College of Agriculture, Kansas State University, Manhattan, Kansas, USA.