TGFB3 and age-related macular degeneration: Additionally, summing the concentrations of active TGF-β2 and TGF-β3 for every single sample, we found that the baseline and month 1 total active TGF-β2/β3 concentration was still significantly lower compared to the control group (controls mean ± SD = 301.8 ± 92.9 pg/mL; baseline AMD mean = 236.9 ± 76.9 pg/mL; month 1 mean ± SD = 235.8 ± 75.1 pg/mL) while month 2 values were slightly, but not significantly, lower than in the control group (month 2 mean ± SD = 244.1 ± 64.73 pg/mL) (Fig. 3).