1. Department of Computer Science, University of Helsinki, Helsinki FI-00014, Finland
2. Applied Tumor Genomics, Research Programs Unit, University of Helsinki, Helsinki FI-00014, Finland
3. Department of Biochemistry, University of Cambridge, CB2 1GA Cambridge, UK
4. Division of Functional Genomics and Systems Biology, Department of Medical Biochemistry and Biophysics, SE 141 83 Stockholm, Sweden
5. Department of Biosciences and Nutrition, Karolinska Institutet, SE 141 83 Stockholm, Sweden
6. Genome-Scale Biology Program, University of Helsinki, Helsinki FI-00014, Finland