1. Institute for Veterinary Medical Research, Centre for Agricultural Research, Hungarian Academy of Sciences, H-1581 Budapest, Hungary
2. Institut de Génétique Moléculaire de Montpellier, CNRS 5535, Montpellier, France
3. Université de Montpellier I, Montpellier, France
4. Université de Montpellier II, Montpellier, France