Anthrax among heroin users in Europe possibly caused by same Bacillus anthracis strain since 2000 Grunow, R and Klee, S R and Beyer, W and George, M and Grunow, D and Barduhn, A and Klar, S and Jacob, D and Elschner, M and Sandven, P and Kjerulf, A and Jensen, J S and Cai, W and Zimmermann, R and Schaade, L, Eurosurveillance, 18, 20437 (2013), https://doi.org/10.2807/ese.18.13.20437-en