1. Department of Bioengineering, University of California San Diego La Jolla CA USA
2. Biological Sciences Division and Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory Richland WA USA
3. Department of Chemistry and Biochemistry, University of California San Diego La Jolla CA USA
4. Systems Biology and Bioinformatics Program, University of California San Diego La Jolla CA USA
5. Department of Bioinformatics and Functional Genomics, Institute of Pharmacy and Molecular Biotechnology, and Bioquant, University of Heidelberg Heidelberg Germany
6. Department of Theoretical Bioinformatics, German Cancer Research Center (DKFZ) Heidelberg Germany