1. Department of Chemistry Vanderbilt University Nashville Tennessee USA
2. Center of Structural Biology Vanderbilt University Nashville Tennessee USA
3. Vanderbilt Vaccine Center Vanderbilt University Medical Center Nashville Tennessee USA
4. Department of Pathology, Microbiology, and Immunology Vanderbilt University Medical Center Nashville Tennessee USA
5. Departments of Pediatrics Vanderbilt University Medical Center Nashville Tennessee USA
6. Institute for Drug Discovery, University Leipzig Medical School Leipzig Germany