1. Instituto Palacios de Salud y Medicina de la Mujer, Madrid, Spain;
2. Department of Obstetrics and Gynecology, Hospital Universitario de Guadalajara, Guadalajara, Spain;
3. Clinic Institute of Gynecology, Obstetrics and Neonatology, Hospital Clínic-Institut d’Investigacions Biomèdiques August Pi i Sunyer, Universitat de Barcelona, Barcelona, Spain;
4. Department of Obstetrics and Gynecology, Hospital Universitario Central de Asturias, Oviedo, Spain;
5. Institut de Sexologia de Barcelona, Barcelona, Spain;
6. DIATROS Diagnósticos y Tratamientos Avanzados S.L.P, Barcelona, Spain