1. Department of Woman and Child Health, University of Padua, Via Giustiniani 3, 35128 Padua, Italy
2. Department of Surgical Sciences, University of Parma, Parma, Italy
3. Dipartimento di Scienze Chirurgiche, U.O.C. di Ginecologia e Ostetricia, Via Gramsci 14, 43100 Parma, Italy