Safety and immunogenicity of the 23-valent pneumococcal polysaccharide vaccine at 12 months of age, following one, two, or threes doses of the 7-valent pneumococcal conjugate vaccine in infancy

Russell FM, Licciardi PV, Balloch A, Biaukula V, Tikoduadua L, Carapetis JR, Nelson J, Jenney AW, Waqatakirewa L, Colquhoun S, Cheung YB, Tang ML, Mulholland EK. Vaccine. 2010;28(18):3086-94.