1. Department of Obstetrics and Gynecology University Hospital Sant Joan Reus Spain
2. Department of Obstetrics and Gynecology University Hospital Virgen de Valme Seville Spain
3. Department Obstetrics and Gynecology University Hospital Virgen de la Arrixaca Murcia Spain
4. Department of Obstetrics and Gynecology University Hospital Castelló Castelló de la Plana Spain
5. Department of Obstetrics and Gynecology Clinica Universidad de Navarra Pamplona Spain