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Phylogenetic tree showing the relationships of the hsp65 genes of patient isolates to related mycobacteria. The tree was constructed by using the neighbor-joining method, and the Nocardia asteroides hsp65 gene sequence was used as outgroup. Bootstrap values were calculated from 1,000 trees. The scale bar indicates the estimated number of substitutions per 100 bases using the Jukes-Cantor correction. Names and accession numbers are given as cited in the GenBank database.
