1. Kid Risk, Inc.; 10524 Moss Park Rd., Ste.; 204-364; Orlando; FL; USA
2. Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases; Division of Viral Diseases; Atlanta; GA; USA
3. World Health Organization; Global Polio Eradication Initiative; Geneva; Switzerland
4. Centers for Disease Control and Prevention, Center for Global Health; Global Immunization Division; Atlanta; GA; USA