1. Livestock Gentec, Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, Canada
2. Department of Animal and Poultry Production, Damanhour University, Damanhour, Egypt
3. Canadian Beef Breeds Council, Calgary, AB, Canada
4. Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, Lacombe, AB, Canada
5. Lacombe Research Centre, Alberta Agriculture and Forestry, Lacombe, AB, Canada
6. Delta G, Miles City, MT, USA
7. Department of Animal, Wildlife and Grassland Sciences, University Free State, Bloemfontein, South Africa