DAMA, Data Mining for Analysis of Microarrays, Department of Morphology and Embryology, University of Ferrara, Italy. s.volinia@unife.it|DAMA, Data Mining for Analysis of Microarrays, Department of Morphology and Embryology, University of Ferrara, Italy. s.volinia@unife.it|DAMA, Data Mining for Analysis of Microarrays, Department of Morphology and Embryology, University of Ferrara, Italy. s.volinia@unife.it|DAMA, Data Mining for Analysis of Microarrays, Department of Morphology and Embryology, University of Ferrara, Italy. s.volinia@unife.it|DAMA, Data Mining for Analysis of Microarrays, Department of Morphology and Embryology, University of Ferrara, Italy. s.volinia@unife.it