1. Department of Animal Science, Iowa State University, Ames IA 50011, USA
2. Hy-Line International, 2583 240th Street, Dallas Center, IA 50063, USA
3. Department of Molecular Biology and Genetics, Center for Quantitative Genetics and Genomics, Aarhus University, Tjele, Denmark
4. TYR, Norwegian beef cattle organization, 2315, Hamar, Norway
5. Genesus Inc., Oakville, MB, R0H 0Y0, Canada
6. Department of Agricultural, Food, and Nutritional Science, Livestock Gentec, University of Alberta, Edmonton AB, T6G 2P5, Canada