1. INRA, UR83 Recherches avicoles, F-37380 Nouzilly, France
2. INRA, UMR85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
3. CNRS, UMR6175, F-37380 Nouzilly, France
4. Université François Rabelais de Tours, F-37041 Tours, France
5. IFCE, F-37380 Nouzilly, France
6. Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, ON, Canada, K1H 8M5