1. Kid Risk, Inc.; 10524 Moss Park Rd.; Ste. 204-364; Orlando, FL; USA
2. National Center for Immunization and Respiratory Diseases; Division of Viral Diseases, Centers for Disease Control and Prevention; Atlanta; GA; USA
3. Center for Biologics Evaluation and Research; Food and Drug Administration; Rockville; MD; USA
4. Department of International Health; Johns Hopkins Bloomberg School of Public Health; Baltimore; MD; USA
5. National Institute for Health and Welfare (THL); Helsinki; Finland
6. National Institute of Biological Standards and Control; Health Protection Agency, South Mimms, Potters Bar, Hertfordshire; UK
7. Dartmouth Medical School; Hanover; NH; USA
8. Biologics Consulting Group, Inc.; Bethesda; MD; USA
9. Polio Eradication Initiative; World Health Organization; Geneva; Switzerland
10. Global Immunization Division, Center for Global Health; Centers for Disease Control and Prevention; Atlanta; GA; USA