Update on the ongoing outbreak of haemolytic uraemic syndrome due to Shiga toxin-producing Escherichia coli (STEC) serotype O104, Germany, May 2011 Askar, M and Faber, M S and Frank, C and Bernard, H and Gilsdorf, A and Fruth, A and Prager, R and Höhle, M and Suess, T and Wadl, M and Krause, G and Stark, K and Werber, D, Eurosurveillance, 16, 19883 (2011), https://doi.org/10.2807/ese.16.22.19883-en