1. Department of Obstetrics and GynecologyUniversity of Parma Parma Italy
2. Department of Obstetrics and GynecologyArnas Civico Hospital Palermo Italy
3. Department of Obstetrics and GynaecologyUniversity Hospital of Northern Norway Tromsø Norway
4. Women's Health and Perinatology Research Group, Department of Clinical Medicine, Faculty of ScienceUiT, The Arctic University of Norway Tromsø Norway
5. Department of Obstetrics and GynecologyUniversity of Brescia Brescia Italy