1. Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, North Carolina
2. Department of Pediatrics, Duke University Medical Center, Durham, North Carolina
3. Public Health Research Institute, International Center for Public Health, UMDNJ-New Jersey Medical School, University of Medicine and Dentistry of New Jersey, Newark, New Jersey
4. Department of Laboratory Animal Resources, Duke University Medical Center, Durham, North Carolina
5. Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, North Carolina
6. Department of Medicine, Duke University Medical Center, Durham, North Carolina