1. Centers for Disease Control and Prevention (CDC); Center for Global Health, Global Immunization Division; Atlanta; Georgia; USA
2. World Health Organization (WHO); Western Pacific Regional Office; Manila; Philippines
3. WHO; Pan American Health Organization; Washington; DC; USA
4. WHO; European Regional Office; Copenhagen; Denmark
5. WHO; Eastern Mediterranean Regional Office; Cairo; Egypt
6. WHO; Regional Office for Africa; Brazzaville; Congo
7. WHO; Headquarters; Geneva; Switzerland