1. Department of Endocrinology and Nutrition, Hospital Clínico San Carlos, IdISSC, 28040 Madrid, Spain
2. Faculty of Medicine, Department of Medicine, Universidad Complutense, 28040 Madrid, Spain
3. Centro de Investigación Biomédica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), 28040 Madrid, Spain
4. Department of Surgery, Hospital Clínico San Carlos, IdISSC, 28040 Madrid, Spain