1. Laboratory of Molecular Cell Biology, Ecole Normale Supérieure de Lyon,UMR CNRS 5161, INRA 1237, IFR128 Biosciences Lyon-Gerland, 46 Allée d'Italie, 69364 Lyon Cedex 07, France
2. Department of Gynecologic Endocrinology and Reproductive Medicine, Medical University of Vienna, Vienna, Austria
3. Research Institute of Molecular Pathology (IMP), Dr Bohr Gasse 7, 1030 Vienna,Austria
4. Université Claude Bernard Lyon I, 43 bd du 11 Novembre 1918, 69622 Villeurbanne cedex, France