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. 2015 May 14;5:10170. doi: 10.1038/srep10170

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(a) Between group estimates of evolutionary diversity (i.e. nucleotide substitutions per site from averaging over all sequence pairs between groups) using maximum composite likelihood model with a gamma distribution. Each group represents a distinct group (I - VI) defining a specific epidemic. Percentages along the diagonal represent the results from likelihood mapping phylogenetic signal analysis (material and methods). The greater the percentage, the higher the “star-like” signal for each clade. (b) Within group estimates for evolutionary diversity and standard errors using the maximum composite likelihood model with a gamma distribution for six distinct groups representing distinct epidemics.