1. University of Guelph, Centre for Genetic Improvement of Livestock, 50 Stone Rd E, N1G 2W1, Guelph, ON, Canada.
2. Hybrid Turkeys, Suite C, 650 Riverbend Drive, Kitchener, Ontario, N2K 3S2, Canada.
3. School of Veterinary Science, University of Queensland, Gatton, Queensland, 4343, Australia.
4. University of Bern, Vetsuisse, 3001 Bern, Switzerland.