Outbreak of norovirus infections associated with consuming food from a catering company, Austria, September 2005 Lederer, I and Schmid, D and Pichler, A M and Dapra, R and Kraler, P and Blassnig, A and Luckner-Hornischer, A and Berghold, C and Allerberger, F, Weekly releases (1997–2007), 10, 2818 (2005), https://doi.org/10.2807/esw.10.42.02818-en