1 Unit of Gynecology and Obstetrics, IRCCS - Arcispedale Santa Maria Nuova, Viale Risorgimento 80, Reggio Emilia 42123, Italy stefanopalomba@tin.it.
2 Department of Reproductive Medicine & Gynecology, University Medical Center Utrecht, Heidelberglaan 100, Utrecht 3584 CX, The Netherlands.
3 Unit of Gynecology and Obstetrics, IRCCS - Arcispedale Santa Maria Nuova, Viale Risorgimento 80, Reggio Emilia 42123, Italy.
4 Unit of Gynecology and Obstetrics, IRCCS - Arcispedale Santa Maria Nuova, Viale Risorgimento 80, Reggio Emilia 42123, Italy University of Modena and Reggio Emilia, Via Università 4, Modena 41100, Italy.