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Consensus phylogenetic tree for representative human picornaviruses and nonhuman enteroviruses constructed by the neighbor-joining method (17) with a Ts/Tv ratio of 8.0. Numbers at nodes represent the percentage of 100 bootstrap pseudoreplicates that contained the cluster distal to the node. Major clusters supported by bootstrap values of at least 67% are enclosed by circles. For clarity, branch lengths are not drawn to scale. PV, poliovirus.
