CXCL12 and type 2 diabetes mellitus: We also measured the amount of serum SDF-1α in the T2D+g (n = 22, 67.5 ± 9.6 years), T2D (n = 21, 64.5 ± 7.1 years), and age-matched healthy control groups (n=18, 62.7 ± 13.1 years).