1. Department of Pathology and Immunology, Washington University in St. Louis, Saint Louis, Missouri 63130, United States
2. Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
3. Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
4. Pacific Northwest National Laboratory, Computational Biology and Bioinformatics Group, Richland, Washington 99354, United States
5. Washington University in St. Louis, Institute for Informatics, Saint Louis, Missouri 63130, United States