1. Division of Gynecology and Obstetrics, University of Bari “Aldo Moro,” Bari, Italy.
2. Clinique Natecia, Lyon, France.
3. Clinique de la Muette, Rue Nicolo, Paris, France.
4. Laboratoire Clément, Paris, France.
5. Laboratoire Oriade, Grenoble, France.
6. Clinique Belledone, Saint-Martin-d'Hères, France.
7. Laboratoire LTB, Narbonne, France.
8. London Fertility Associates, London, England.