1. Laboratoire d’Eylau (J.T.), 75116 Paris, France;
2. Department of Obstetrics and Gynecology (M.G.), Università Cattolica del Sacro Cuore, 00168 Rome, Italy;
3. Department of Biochemistry and Molecular Biology (C.M.), University of Granada Faculty of Sciences, 18071 Granada, Spain;
4. Center of Reproductive Medicine, European Hospital (E.G.), 00149 Rome, Italy