1. Department of Endocrinology and Nutrition, Hospital Dos de Maig, Barcelona, Spain.
2. Department of Research, Hospital de Mataró, Mataró, Spain.
3. Hormone Laboratory, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain.
4. Women Health Center, Mataró, Spain.
5. Department of Gynecology, Hospital de Vielha, Viella, Spain.
6. Department of Gynecology, Hospital Comarcal del Pallars, Tremp, Spain.
7. Primary Health Care Center of Seu d'Urgell, Seu d'Urgell, Spain.
8. Department of Gynecology, Hospital de la Seu d'Urgell, Seu d'Urgell, Spain.
9. Department of Gynecology, Hospital de Puigcerdà, Puigcerdà, Spain.
10. Department of Endocrinology, Hospital Clínic de Barcelona, Barcelona, Spain.