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Similarity dendrogram obtained from the spoligotypes of the Spanish isolates in the spoligotyping results data set (n = 233). The scale on the left indicates the genetic distances among the M. tuberculosis strains (0 corresponds to identical patterns). On the right, the shared type numbers and family names, when applicable, for the clustered strains are shown. The text size is proportional to the sizes of the clusters. The asterisks indicate the shared types specific to Spain.
