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Phylogenetic dendrogram of NoV GII. The phylogenetic tree is based on a 280-bp fragment within NoV orf1 and was calculated with the neighbor-joining algorithm. Twenty-three Hannoverian sequences from the years 2005 to 2008 were compared to 20 well-classified sequence database entries. The GI.1 Norwalk virus sequence was used as the out-group. Hannoverian sequences are indicated by gray boxes. Bootstrap values indicate percentages of 1,000-fold replicates.
