1. Department of Surgery, Pennsylvania State University, College of Medicine, Hershey
2. Department of Microbiology, Immunology and Cancer Biology, University of Virginia Health System, Charlottesville
3. Department of Public Health Sciences, University of Virginia, Charlottesville
4. Department of Public Health Sciences, Pennsylvania State University, College of Medicine, Hershey
5. Department of Statistics, University of Virginia, Charlottesville
6. Department of Medicine, University of Virginia Health System, Charlottesville
7. Department of Pathology, University of Virginia Health System, Charlottesville
8. Department of Surgery, University of Arizona, Tucson