1. World Bank, 1776 G St NW, Washington, DC, 20006, United States of America (USA).
2. Center for Global Child Health, Toronto, Ontario, Canada.
3. Department of Immunization, Vaccines and Biologicals, World Health Organization, Geneva, Switzerland.
4. Epidemiology and International Health, London School of Hygiene and Tropical Medicine, London, England.
5. Gavi, The Vaccine Alliance, Geneva, Switzerland.
6. International Institute for Primary Health Care, Ministry of Health, Addis Ababa, Ethiopia.
7. The Bill & Melinda Gates Foundation, Seattle, USA.
8. Ministry of Health, Community Development, Gender, Elderly and Children, Dodoma, United Republic of Tanzania.
9. Health Section, United Nations Children's Fund, New York, USA.
10. Chemin de la Capite 6, 1295 Tannay, Switzerland.
11. Reproductive Health and HIV Institute, University of the Witwatersrand, Johannesburg, South Africa.
12. Kepala Sawit E/23, Cinere 16514, Indonesia.
13. Department of International Public Health, Liverpool School of Tropical Medicine, Liverpool, England.
14. International Center for Equity in Health, Federal University of Pelotas, Pelotas, Brazil.