1. Department of Urology, Careggi Hospital, University of Florence, Florence, Italy.
2. Department of Gynecology and Obstetrics, St. Claire Hospital, University of Pisa, Pisa, Italy.
3. Department of Radiology, Salvador Zubirán National Institute of Health Sciences and Nutrition, Mexico City, Mexico.
4. Department of Urology, Vittorio Emanuele II, University of Catania, Catania, Italy.
5. Assisted Reproductive Technology Centre, Careggi Hospital, University of Florence, Florence, Italy.
6. Department of Urology, “La Sapienza” University of Rome, Rome, Italy.