Streptococcus pneumoniae nasopharyngeal colonisation in children aged under six years with acute respiratory tract infection in Lithuania, February 2012 to March 2013 Usonis, V and Stacevičienė, I and Petraitienė, S and Vaičiūnienė, D and Alasevičius, T and Kirslienė, J, Eurosurveillance, 20, 21079 (2015), https://doi.org/10.2807/1560-7917.ES2015.20.13.21079