1. Hospital Universitario Central de Asturias, Oviedo, Spain;
2. Fundació Puigvert Barcelona, Barcelona, Spain;
3. Instituto Europeo de Sexologia, Marbella, Spain;
4. Department of Obstetrics & Gynecology, University of Granada, Granada, Spain;
5. Hospital Unversitario de Cruces, Bilbao, Spain;
6. Department of Obstetrics & Gynecology, University of Miguel Henández, Elche, Alicante, Spain;
7. Diatros, Barcelona, Spai'n;
8. Hospital Universitario de Puerto Real, Puerto Real, Spain