1. Departamento de Medicina Preventiva, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
2. Departamento de Ciências da Saúde, Universidade Federal de Santa Catarina, Araranguá, Brazil
3. Cochrane South Africa, South African Medical Research Council, Cape Town, South Africa
4. Division of Epidemiology and Biostatistics, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
5. Vaccine-Preventable Diseases Programme, Universal Health Coverage/Communicable and Non-Communicable Diseases Cluster, World Health Organization Regional Office for Africa, Brazzaville, Congo