CXCL12 and age-related macular degeneration: Furthermore, the difference in the the SDF-1α levels between intermediate AMD (median 160.9 pg/ml, range 130–166.3), late AMD (median 161 pg/ml, range 154.1.9–171.6), and control groups (median 161 pg/ml, range 155.2–219) was not significant (p=0.763, (Table 1)).