1. Immunization Unit, Pan American Health Organization, Washington, DC, USA
2. Department of Pediatrics, School of Medicine, University of Michigan, Ann Arbor, MI, USA
3. Antimicrobial Resitance Unit, Pan American Health Organization, Washington, DC, USA
4. Department of Immunizations, Biologicals, and Vaccines, World Health Organization, Geneva, Switzerland
5. Pan American Health Organization, Washington, DC, USA
6. Non-communicable Diseases and Mental Health, Pan American Health Organization, Washington, DC, USA