Bioinformatics and Genomics Program, Centre for Genomic Regulation, 08003 Barcelona, Spain.|Bioinformatics and Genomics Program, Centre for Genomic Regulation, 08003 Barcelona, Spain.|Bioinformatics and Genomics Program, Centre for Genomic Regulation, 08003 Barcelona, Spain.|Bioinformatics and Genomics Program, Centre for Genomic Regulation, 08003 Barcelona, Spain.|Bioinformatics and Genomics Program, Centre for Genomic Regulation, 08003 Barcelona, Spain.