1. Department of Obstetrics and Gynecology; EOC - Beata Vergine Hospital; Mendrisio Switzerland
2. Department of Obstetrics and Gynecology; G. Fornaroli Hospital; Magenta Italy
3. Department of Obstetrics and Gynecology; University of Insubria; Varese Italy
4. Department of Woman and Child Health; Fondazione Policlinico Gemelli; Rome Italy