Gomez, C.A. et al. 2025. Clinical and microbiological characteristics of paediatric patients hospitalized for pneumococcal pneumonia before and after the introduction of pneumococcal conjugate vaccines. Revista Peruana de Medicina Experimental y Salud Pública. 42, 1 (Mar. 2025). DOI:https://doi.org/10.17843/rpmesp.2025.421.13847.