Department of Computer Science, University of Verona, 37134 Verona, Italy, Center for BioMedical Computing, University of Verona, 37134 Verona, Italy and The Microsoft Research - University of Trento, Centre for Computational and Systems Biology (COSBI), 38068 Rovereto (TN), Italy Department of Computer Science, University of Verona, 37134 Verona, Italy, Center for BioMedical Computing, University of Verona, 37134 Verona, Italy and The Microsoft Research - University of Trento, Centre for Computational and Systems Biology (COSBI), 38068 Rovereto (TN), Italy Department of Computer Science, University of Verona, 37134 Verona, Italy, Center for BioMedical Computing, University of Verona, 37134 Verona, Italy and The Microsoft Research - University of Trento, Centre for Computational and Systems Biology (COSBI), 38068 Rovereto (TN), Italy Department of Computer Science, University of Verona, 37134 Verona, Italy, Center for BioMedical Computing, University of Verona, 37134 Verona, Italy and The Microsoft Research - University of Trento, Centre for Computational and Systems Biology (COSBI), 38068 Rovereto (TN), Italy.|Department of Computer Science, University of Verona, 37134 Verona, Italy, Center for BioMedical Computing, University of Verona, 37134 Verona, Italy and The Microsoft Research - University of Trento, Centre for Computational and Systems Biology (COSBI), 38068 Rovereto (TN), Italy Department of Computer Science, University of Verona, 37134 Verona, Italy, Center for BioMedical Computing, University of Verona, 37134 Verona, Italy and The Microsoft Research - University of Trento, Centre for Computational and Systems Biology (COSBI), 38068 Rovereto (TN), Italy.