Reduced serum concentrations of carboxylated and undercarboxylated osteocalcin are associated with risk of developing type 2 diabetes mellitus in a high cardiovascular risk population: a nested case-control study - Díaz-López, A; Bulló, M; Juanola-Falgarona, M; Martínez-González, M A; Estruch, R; Covas, M I; Arós, F; Salas-Salvadó, J (J Clin Endocrinol Metab, 2013)