Swiss Institute of Bioinformatics, Computational Cancer Genomics Group-ISREC, Ch. des Boveresses 155, 1066 Epalinges, Switzerland. peter.sperisen@isb-sib.ch|Swiss Institute of Bioinformatics, Computational Cancer Genomics Group-ISREC, Ch. des Boveresses 155, 1066 Epalinges, Switzerland. peter.sperisen@isb-sib.ch