Affiliation: | (1) USDA, ARS, Roman L. Hruska U.S. Meat Animal Research Center, Spur 18D, PO Box 166, Clay Center, Nebraska 68933-0166, USA, US;(2) Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas 66506-5602, USA, US;(3) Department of Veterinary Pathobiology, University of Minnesota, St. Paul, Minnesota, U.S.A., US |