Use of seven-valent pneumococcal conjugate vaccine (PCV7) in Europe, 2001-2007
De Carvalho Gomes, H and Muscat, M and Monnet, D L and Giesecke, J and Lopalco , P L, Eurosurveillance, 14, 19159 (2009), https://doi.org/10.2807/ese.14.12.19159-en