1. Pharmaceutical
Sciences Division, School of Pharmacy, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
2. Biological
Chemistry and Molecular Pharmacology Department, Harvard Medical School, Boston, Massachusetts 02115, United States
3. Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
4. Center for
Information Technology, National Institutes of Health, Bethesda, Maryland 20892-5624, United States