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Lycopene concentration by study groups (a) and age groups (b). RASIG (n = 794); GO (n = 493); SGO (n = 272). Outliers and extreme values are included in the analyses but not shown in the figure. Statistically significant differences are indicated by asterisks: ∗P < 0.05, ∗∗P < 0.01, and ∗∗∗P < 0.001.
