1. Epidemic Intelligence Service assigned to National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases, Respiratory Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
2. Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases, Division of Bacterial Diseases, Respiratory Diseases Branch, Atlanta, Georgia, USA
3. Oregon Health Authority, Portland, Oregon, USA
4. Minnesota Department of Health, St. Paul, Minnesota, USA
5. Vanderbilt University School of Medicine, Nashville, Tennessee, USA
6. Emory University School of Medicine and the VA Medical Center, Atlanta, Georgia, USA
7. Connecticut Department of Public Health, Hartford, Connecticut, USA
8. California Department of Public Health, Richmond, California, USA
9. New York State Department of Health, Albany, New York, USA
10. Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
11. Colorado Department of Public Health and Environment, Denver, Colorado, USA
12. New Mexico Department of Health, Santa Fe, New Mexico, USA