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(A) HCV-1a and (B) HCV-3a MCC trees showing the classical star-shaped phylogenies. (C) HCV-1b MCC tree showing four well-supported groups named Groups 1–4. (D) Skyride plot showing the population dynamics and TMRCA for the NS5B HCV region of subtypes 1a, -1b and -3a. MCC, maximum clade credibility; TMRCA, time to most recent common ancestor.
