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Maximum clade credibility (MCC) phylogenetic tree for the entire VP1 sequences of coxsackievirus B3 (CV-B3) in the world. The branches were colored according to the location of isolates. The isolates were classified into 8 groups, shown in the figure, denoted A to H (names based on the dates in order of appearance of groups). The detailed information of isolates, including GenBank accession numbers and names of strains, are presented in Additional file 1: Table S1
