1. Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia;
2. Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, United Kingdom;
3. Department of Immunization, Vaccines and Biologicals, World Health Organization, Geneva, Switzerland;
4. Centre for International Health, University of Otago, Dunedin, New Zealand;
5. Division of Infectious Diseases and International Health, Duke University Medical Center, Durham, North Carolina;
6. Policy and Economic Research Department, Development and Delivery Unit, International Vaccine Institute, Seoul, South Korea;
7. Johns Hopkins University School of Medicine, Baltimore, Maryland;
8. Division of Healthcare Quality and Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia