Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40246-017-0120-8/MediaObjects/40246_2017_120_Fig3_HTML.gif)
TagSNPs across the VEGFA gene are associated with disease phenotype (a) and HU treatment efficacy (b). a disease phenotype, rs3024997 (G>A; healthy individuals vs. NTDT patients p = 0.005; β-thalassemia major patients vs. NTDT patients p = 0.003) and rs2146323 (C>A; healthy individuals vs. β-thalassemia major patients p = 0.03; healthy individuals vs. NTDT patients p = 0.0005; β-thalassemia major patients vs. NTDT patients p = 0.009). b HU treatment efficacy, rs2146323 (C>A; HU responders vs. HU non-responders p = 0.0002). HU: hydroxyurea