1. Alberta Agriculture and Rural Development, Livestock and Farm Business Branch, 5712- 48 Av, Camrose Alberta T4V 0K1
2. Department of Animal Science, Faculty of Agricultural and Food Sciences, University of Manitoba, Winnipeg, MB R3T 2N2
3. Livestock Gentec, Edmonton, AB, Canada T6G 2C8
4. Agriculture and Agri-Food Canada, Lacombe Research Centre, 6000 C & E Trail, Lacombe, AB, Canada T4L 1W1