1. The role of WHO in public health. http://www.who.int/about/role/en/index.html [last accessed 04.02.12].
2. WHO vaccine position papers. http://www.who.int/immunization/position_papers/en/ [last accessed 04.02.12].
3. Strategic Advisory Group of Experts (SAGE) Terms of reference. http://www.who.int/immunization/sage/SAGE_TOR_1_September_2010.pdf [last accessed 04.02.12].
4. Establishing global policy recommendations and achieving global goals: the Strategic Advisory Group of Experts on immunization;Duclos;Exp Rev Vaccines,2011
5. Documentation from previous SAGE meetings. http://www.who.int/immunization/sage/previous/en/index.html [last accessed 04.02.12].