Usefulness of porA sequencing in distinguishing sporadic and linked cases of serogroup B invasive meningococcal disease in Suffolk, United Kingdom, December 2009 to January 2010 Varadarajan, A and Sundkvist, T and Jayatilleke, N and Williams, C and Gray, S J and Carr, A D and Kaczmarski, E B, Eurosurveillance, 16, 19775 (2011), https://doi.org/10.2807/ese.16.04.19775-en