1. Endocrinology & Nutrition Department, Hospital Universitario Ramón y Cajal, Madrid, Spain
2. Instituto de Investigación Biomédica Ramón y Cajal (IRYCIS), Madrid, Spain
3. University of Alcalá, Madrid, Spain
4. Urology Department, Hospital Universitario Ramón y Cajal, Madrid, Spain
5. Endocrinology & Nutrition Department, Hospital Universitario Gregorio Marañón, Madrid, Spain
6. Endocrinology & Nutrition Department, Hospital Universitario de Albacete, Albacete, Spain
7. Endocrinology & Nutrition Department, Hospital Clinic, Barcelona, Spain
8. Endocrinology & Nutrition Department, Hospital Universitario Virgen de la Macarena, Sevilla, Spain
9. Endocrinology & Nutrition Department, Hospital Universitario La Paz Madrid, Madrid, Spain
10. Endocrinology & Nutrition Department, Hospital Universitario Príncipe de Asturias, Madrid, Spain
11. Endocrinology & Nutrition Department, Institut Català de la Salut Girona, Girona, Spain
12. Endocrinology & Nutrition Department, Hospital Universitario de Cabueñes, Asturias, Spain
13. Endocrinology & Nutrition Department, Hospital Royo Villanova, Zaragoza, Spain
14. Endocrinology & Nutrition Department, Hospital Clínico San Carlos, Madrid, Spain
15. Endocrinology & Nutrition Department, Hospital Universitario de Toledo, Toledo, Spain
16. Endocrinology & Nutrition Department, Hospital Universitario Central de Asturias, Oviedo, Spain
17. Instituto de Investigación Sanitaria del Principado de Asturias (ISPA)
18. General & Digestive Surgery Department, Hospital Universitario de La Princesa, Madrid, Spain
19. Department of Endocrinology and Nutrition, Joan XXIII University Hospital, Tarragona, Spain
20. Endocrinology & Nutrition Department, Hospital Universitario Doce de Octubre, Madrid, Spain