Necrotizing pneumonia due to Streptococcus pneumoniae in children during the period of non-systematic use of PCV13 in Catalonia, Spain Sebastià González-Peris; Magda Campins; Juan José García-García; Álvaro Díaz-Conradi; Ángela Domínguez; Pilar Ciruela; Mariona F. de Sevilla; Sergi Hernández; Carmen Muñoz-Almagro; Conchita Izquierdo; Gemma Codina; Sonia Uriona; Cristina Esteva; Anna Solé-Ribalta; Núria Soldevila; Ana María Planes; Johanna Martínez-Osorio; Luis Salleras; Fernando Moraga-Llop;

Changes in the epidemiology of acute mastoiditis according to the implementation of pneumococcal vaccination in a Spanish population Ángela Manzanares; David Aguilera-Alonso; María Escobar; Sara Vigil-Vázquez; Emilia Cercenado; Jesús Saavedra-Lozano;

Epidemiology of pneumococcal diseases in Spain after the introduction of pneumococcal conjugate vaccines Jose Maria Marimon; Carmen Ardanuy;