[1] Gen Univ Gregorio Maranon Hosp, Endocrinol & Nutr Dept, C Dr Esquerdo 46, Madrid 28007, Spain
[2] Univ Europea Madrid, Madrid, Spain
[3] Gen Univ Gregorio Maranon Hosp, Internal Med Dept, Madrid, Spain
[4] Rey Juan Carlos Univ Hosp, Internal Med Dept, Madrid, Spain
[5] Salamanca Biomed Res Inst IBSAL, Dept Biostat Unit, Salamanca, Spain