DNA demethylation in the human FOXP3 locus discriminates regulatory T cells from activated FOXP3(+) conventional T cells - Baron, U; Floess, S; Wieczorek, G; Baumann, K; Grutzkau, A; Dong, J; Thiel, A; Boeld, T J; Hoffmann, P; Edinger, M; Turbachova, I; Hamann, A; Olek, S; Huehn, J (Eur J Immunol, 2007)