1. USAID’s MOMENTUM Country and Global Leadership, International Vaccine Access Center (IVAC), Johns Hopkins University, Baltimore, MD 21231, USA
2. Department of Immunization, Vaccines & Biologicals (IVB), World Health Organization, WHO, 1211 Geneva, Switzerland
3. Duke-Robert J. Margolis, MD, Center for Health Policy, Washington, DC 20004, USA
4. Duke Global Health Innovation Center, Durham, NC 27701, USA
5. Welch Medical Library, Johns Hopkins University, Baltimore, MD 21205, USA
6. Direct Consulting and Logistics Limited, Abuja 901101, Federal Capital Territory, Nigeria