1. Department of Gynaecology (J.C.), Hospital San Joan de Déu, 08950 Barcelona, Spain
2. Department of Gynaecology (J.C., J.J.E.), Hospital de la Santa Creu i Sant Pau, 08025 Barcelona, Spain
3. Department of Gynaecology (E.L.), Hospital Virgen de la Arrixaca, 30120 Murcia, Spain
4. Department of Gynaecology (A.M.), Hospital Clínico Universitario de Valencia, 46010 Valencia, Spain
5. Department of Endocrinology (J.A.), Clínica Puerta de Hierro, 28035 Madrid, Spain
6. Department of Gynaecology (A.F.), Hospital Clínic i Provincial de Barcelona, 08036 Barcelona, Spain
7. Department of Endocrinology (O.V.), Hospital Juan Canalejo, 15006 La Coruña, Spain
8. Department of Endocrinology (F.E.-J., E.T.), Hospital Clínico de Granada, 18012 Granada, Spain