1 Maternal and Child Health Division, International Centre for Diarrhoeal Disease Research, Bangladesh.
2 Office of the Executive Director, The Global Fund to Fight AIDS, Tuberculosis and Malaria, Geneva, Switzerland.
3 Global Financing Facility for Women, Children and Adolescents, Washington, DC, United States of America.
4 London School of Hygiene and Tropical Medicine, London, England.
5 Gavi, the Vaccine Alliance, Geneva, Switzerland.
6 Département de gestion, d'évaluation et de politique de santé, École de santé publique de l'Université de Montréal, 7101, avenue du Parc, Montréal, QuébecH3N 1X9, Canada.