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Phylogenetic analysis of the nucleotide sequences of the NSP4 gene of rotavirus. A phylogenetic tree was constructed based on the neighbor-joining method within the MEGA package. Percentage bootstrap values above 60% are shown at branch nodes. The scale bar represents a 1% nucleotide difference. The Taiwanese strains recovered from diarrhea-free infections are indicated by boldface italic type. The other Taiwanese rotavirus strains are indicated by boldface type.
