1. Pneumococcal conjugate vaccine for childhood immunization – WHO position paper;Wkly Epidemiol Rec,2007
2. The United Nations Children’s Fund, World Health Organization. Pneumonia the Forgotten Killer of Children. The United Nations Children’s Fund (UNICEF)/World Health Organization; 2006. Available at: http://www.who.int/maternal_child_adolescent/documents/9280640489/en/.
3. More evidence for use of pneumococcal conjugate vaccines;Whitney;Lancet,2013
4. Clinical implications of pneumococcal serotypes: Invasive disease potential, clinical presentations, and antibiotic resistance;Song;J Korean Med Sci,2013
5. Epidemiological differences among pneumococcal serotypes;Hausdorff;Lancet Infect Dis,2005