1. Wageningen University and Research , P.O. Box 338, 6700 AH, Wageningen , The Netherlands
2. Hybrid Turkeys , 650 Riverbend Drive Suite C, Kitchener, ON N2K 3S2 , Canada
3. School of Veterinary Science, University of Queensland , Gatton, QLD 4343 , Australia
4. Hendrix Genetics Research, Technology & Services , Boxmeer, AC 5830 , The Netherlands