Differential regulation of the α-globin locus by Krüppel-like factor 3 in erythroid and non-erythroid cells by Funnell, A, Vernimmen, D, Lim, W, Mak, K, Wienert, B, Martyn, G, Artuz, C, Burdach, J, Quinlan, K, Higgs, D, Whitelaw, E, Pearson, R, Crossley, M