Persistent occurrence of serogroup Y/sequence type (ST)-23 complex invasive meningococcal disease among patients aged five to 14 years, Italy, 2007 to 2013 Fazio, Cecilia and Neri, Arianna and Renna, Giovanna and Vacca, Paola and Antonetti, Raffaele and Barbui, Anna Maria and Daprai, Laura and Lanzafame, Paolo and Rossi, Lucia and Santino, Iolanda and Tascini, Carlo and Vocale, Caterina and Stefanelli, Paola, Eurosurveillance, 20, 30061 (2015), https://doi.org/10.2807/1560-7917.ES.2015.20.45.30061