Feikin DR, Kagucia EW, Loo JD, Link-Gelles R, Puhan MA, Cherian T, Levine OS, Whitney CG, O’Brien KL, Moore MR, the Serotype Replacement Study Group (including McIntyre P, Menzies R, Jayasinghe S) Abstract Pneumococcal disease 2013 PLoS Medicine 2013;10:e1001517