1. Department of Animal Sciences, North Dakota State University, Fargo, ND, USA
2. USDA-Agricultural Research Service, Edward T. Schafer Agricultural Research Center, Biosciences Research Laboratory, Fargo, ND, USA
3. USDA-Agricultural Research Service, US Meat Animal Research Center, NE, USA
4. Department of Clinical Sciences, School of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
5. Department of Anatomy and Physiology, School of Veterinary Medicine, Kansas State University, Manhattan, KS, USA