1. Department of Endocrinology & Nutrition, Hospital Universitario Ramón y Cajal & Instituto de Investigación Biomédica Ramón y Cajal (IRYCIS), Madrid, Spain
2. University of Alcalá, Madrid, Spain
3. Department of Endocrinology & Nutrition, OSI Bilbao-Basurto, Hospital Universitario de Basurton & Basque Country University, Medicine Department, Bilbao, Spain
4. Department of Endocrinology & Nutrition, Hospital Universitario de Castellón, Castellón, Spain
5. Department of Biochemistry, Hospital Universitario Ramón y Cajal, Madrid, Spain
6. Department of Endocrinology & Nutrition, Hospital Universitario La Paz Madrid, Spain
7. Department of Endocrinology & Nutrition, Hospital Universitario Fundación Jiménez Díaz, Madrid, Spain
8. Department of Endocrinology & Nutrition, Hospital Universitario de Toledo, Toledo, Spain
9. Department of Endocrinology & Nutrition, Hospital Universitario de Valladolid, Valladolid, Spain
10. Department of Endocrinology & Nutrition, Hospital Universitario Rey Juan Carlos, Madrid, Spain
11. Department of General & Digestive Surgery, Hospital Universitario de La Princesa, Madrid, Spain
12. Department of Endocrinology & Nutrition, Institut Català de la Salut Girona, Girona, Spain
13. Department of Endocrinology & Nutrition, Hospital Universitario Virgen de la Victoria de Málaga, IBIMA Malaga, Spain CIBEROBN, Madrid, Spain
14. Department of Endocrinology & Nutrition, Hospital Universitario Infanta Sofía, Madrid, Spain
15. Department of Endocrinology & Nutrition, Clínica Universidad de Navarra, Pamplona, Spain
16. Department of Endocrinology & Nutrition, Hospital Universitario Central de Asturias & Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
17. Department of Endocrinology & Nutrition, Hospital Universitario Gregorio Marañón, Madrid, Spain
18. Department of Endocrinology & Nutrition, Hospital Reina Sofía, Córdoba, Spain
19. Department of Endocrinology & Nutrition, Hospital Rollo Villanova, Zaragoza, Spain
20. Department of Endocrinology & Nutrition, Complejo Universitario de Salamanca, Salamanca, Spain
21. Biochemistry and Molecular Genetics Department-CDB, Hospital Clinic, IDIBAPS, CIBERehd, Barcelona, Spain
22. Department of Endocrinology & Nutrition, Hospital Doce de Octubre, Madrid, Spain
23. Department of Endocrinology & Nutrition, Hospital Universitario La Princesa, Madrid, Spain
24. Department of Nephrology, Hospital Universitario Doctor Peser, Valencia, Spain
25. Department of Endocrinology & Nutrition, Hospital Universitario Son Espases, Islas Baleares, Spain
26. Department of Endocrinology & Nutrition, Hospital Universitario De Albacete, Albacete, Spain
27. Department of Endocrinology & Nutrition, Hospital Virgen de la Macarena, Sevilla, Spain
28. Department of Endocrinology & Nutrition, Hospital General Universitario de Alicante, Alicante, Spain
29. Department of Endocrinology and Nutrition, Joan XXIII University Hospital, Tarragona, Spain
30. Internal Medicine, Hospital Infanta Leonor de Vallecas, Madrid, Spain
31. Department of Endocrinology & Nutrition, Hospital Clinic, IDIPAS, Barcelona, Spain