1. Meningitis and Vaccine Preventable Diseases Branch, Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention , Atlanta, Georgia , USA
2. Colorado Department of Public Health and Environment , Denver, Colorado , USA
3. Connecticut Department of Public Health , Hartford, Connecticut , USA
4. Georgia Department of Public Health , Atlanta, Georgia , USA
5. Minnesota Department of Public Health , St. Paul, Minnesota , USA
6. New Mexico Department of Health , Santa Fe, New Mexico , USA
7. New York State Department of Public Health , Albany, New York , USA
8. Oregon Health Authority , Portland, Oregon , USA
9. Meningitis and Vaccine Preventable Diseases Branch, Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA (now with GSK Vaccines)