[1] European Mol Biol Lab, Gene Express Programme, D-69117 Heidelberg, Germany
[2] Deutsch Krebsforschungszentrum, Div Mol Genet B060, INF 280, D-69120 Heidelberg, Germany
[3] Adolf Butenandt Inst, D-80336 Munich, Germany
[4] Spanish Natl Canc Ctr, Canc Epigenet Lab, Mol Pathol Programme, Madrid 28029, Spain