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A, Ratio of lower lip to upper lip heights that were perceived as treated. The blue line represents group 1 (mean age, 32.5 years; n = 49) and the orange line represents group 2 (mean age, 52 years; n = 49). B, Ratio of lower lip to upper lip heights that were perceived as artificial. The blue line represents group 1 and the orange line represents group 2.
