1. Faculty of Medicine, University of the Basque Country, Obstetrics and Gynaecology Clinical Management Unit, Araba University Hospital, Vitoria, Spain;
2. Obstetrics and Gynaecology Department, Ourense Hospital Complex, Ourense, Spain;
3. Obstetrics and Gynaecology Department, Associate University Hospital of Requena, Requena, Spain;
4. Sexual Orientation Centre for Young People, Andalusian Health Service, Malaga, Spain;
5. HRA Pharma, Madrid, Spain;
6. Clínica Diatros, Barcelona, Spain