1. Department of Bioinformatics and Computational Biology, Genentech Inc., South San Francisco, CA 94080, USA.
2. Razavi Newman Center for Bioinformatics, Salk Institute for Biological Studies, La Jolla, CA 94027, USA.
3. Departments of Pharmacology, Cellular and Molecular Medicine, and Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA.