Bioinformatics and Functional Genomics research group, Cancer Research Center (IMBCC, CSIC/USAL) and Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain.|Unidad de Diagnóstico Molecular y Celular del Cáncer, Cancer Research Center (IMBCC, CSIC/USAL) and Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain.|Bioinformatics and Functional Genomics research group, Cancer Research Center (IMBCC, CSIC/USAL) and Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain.|Bioinformatics and Functional Genomics research group, Cancer Research Center (IMBCC, CSIC/USAL) and Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain.|Unidad de Diagnóstico Molecular y Celular del Cáncer, Cancer Research Center (IMBCC, CSIC/USAL) and Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain.|Bioinformatics and Functional Genomics research group, Cancer Research Center (IMBCC, CSIC/USAL) and Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain. jrivas@usal.es.