1. International Scientific Institute ‘Paul VI’; Catholic University; Rome Italy
2. Department of Experimental Medicine; University of Perugia; Perugia Italy
3. Department of Medicine, Andrology and Reproductive Unit; University of Padova; Padova Italy
4. Unit of Diagnosis and Treatment of Human Reproduction University of Perugia; Perugia Italy
5. Division of Endocrinology; Catholic University; Rome Italy
6. Department of Medicine; University of Perugia; Perugia Italy