A Timescale for Evolution, Population Expansion, and Spatial Spread of an Emerging Clone of Methicillin-Resistant Staphylococcus aureus
Figure 3
Effect of date permutation on the estimate of divergence time.
Age of the ST225 clade (tmrca, time since the most recent common ancestor) and 95% confidence intervals on a log scale, determined by Bayesian phylogenetics analysis with the tips constrained by the correct dates and with the dates switched across isolates (permutations 1 to 5).