[1] Hosp Univ Cent Asturias, Oviedo, Spain
[2] Fundacio Puigvert Barcelona, Barcelona, Spain
[3] Inst Europeo Sexol, Marbella, Spain
[4] Univ Granada, Dept Obstet & Gynecol, Granada, Spain
[5] Hosp Unversitario Cruces, Bilbao, Spain
[6] Univ Miguel Henandez, Dept Obstet & Gynecol, Alicante, Spain
[7] Diatros, Barcelona, Spain
[8] Hosp Univ Puerto Real, Puerto Real, Spain