1. University of Virginia, Charlottesville
2. Centers for Disease Control and Prevention, Atlanta
3. University of British Columbia, Vancouver
4. Duke University, Durham, North Carolina
5. St. Luke's Episcopal Hospital, Houston
6. The Johns Hopkins University School of Public Health, Baltimore
7. Children's Hospital and Medical Center, Seattle
8. Memorial Hospital of Rhode Island, Pawtucket
9. University of Pennsylvania, Philadelphia
10. Infections Control Advisory Net, Eden Prairie, Minnesota
11. New England Medical Center, Boston