1. New York Structural Biology Center, New York, NY, USA
2. Division of Infectious Diseases, Wadsworth Center, New York State Department of Health, Albany, NY, USA
3. Department of Biochemistry and Molecular Biophysics Graduate Group, University of Pennsylvania, Philadelphia, PA, USA
4. Department of Pharmaceutical Chemistry and Macromolecule and Vaccine Stabilization Center, University of Kansas, Lawrence, KS, USA
5. Department of Chemistry and Ralph Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, KS, USA
6. Institute for Cancer Research, Fox Chase Cancer Center, Philadelphia, PA, USA