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Phylogenetic analysis of norovirus genogroup-I at a waterpark in Gyeonggi-do. Analysis was conducted using MegAlign, version 5.03 (DNAStar, Madison, Wis). The noroviruses detected in the fecal specimens from the patients of this outbreak were typed as GI-4 (most similar to GI-4 Chiba the GenBank accession number AF145896), as was the norovirus isolated from the groundwater.
