1. Department of Computer Science and Engineering, University of California San Diego, San Diego, California, USA.
2. Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany.
3. Department of Mathematics, Biocomplexity Institute & Initiative, University of Virginia, Charlottesville, Virginia, USA.
4. Department of Quantitative and Computational Biology, University of Southern California, Los Angeles, California, USA.
5. Department of Computer Science, Center for Computational Molecular Biology, Brown University, Providence, Rhode Island, USA.