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Mean abundances at the genus level in facial cheek skin of high hydration group (HHG) and low hydration group (LHG) (a) and statistical box‐plot analysis for the relative abundance of Propionibacterium (b) and Ralstonia (c). The mean abundance was the mean value of the relative abundance of each genus in the sampling groups, and significant differences are indicated by *p < .05 and ***p < .001
