Genome Biology Group, Centre Nacional dAnàlisi Genòmica (CNAG), Barcelona, Spain , Gene Regulation Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), Barcelona, Spain.|Genome Biology Group, Centre Nacional dAnàlisi Genòmica (CNAG), Barcelona, Spain , Gene Regulation Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), Barcelona, Spain.|Genome Biology Group, Centre Nacional dAnàlisi Genòmica (CNAG), Barcelona, Spain , Gene Regulation Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), Barcelona, Spain.|Genome Biology Group, Centre Nacional dAnàlisi Genòmica (CNAG), Barcelona, Spain , Gene Regulation Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), Barcelona, Spain.|Genome Biology Group, Centre Nacional dAnàlisi Genòmica (CNAG), Barcelona, Spain , Gene Regulation Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), Barcelona, Spain.|Genome Biology Group, Centre Nacional dAnàlisi Genòmica (CNAG), Barcelona, Spain , Gene Regulation Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), Barcelona, Spain.|Genome Biology Group, Centre Nacional dAnàlisi Genòmica (CNAG), Barcelona, Spain , Gene Regulation Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), Barcelona, Spain.|Genome Biology Group, Centre Nacional dAnàlisi Genòmica (CNAG), Barcelona, Spain , Gene Regulation Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), Barcelona, Spain.|Genome Biology Group, Centre Nacional dAnàlisi Genòmica (CNAG), Barcelona, Spain , Gene Regulation Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), Barcelona, Spain.|Genome Biology Group, Centre Nacional dAnàlisi Genòmica (CNAG), Barcelona, Spain , Gene Regulation Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), Barcelona, Spain.