GALT enzyme activities among different categories of GALT biochemical phenotypes in 34 Korean patients. The bars in the boxes represent the median values, and the areas above and below the bars in the boxes represent the upper and lower quartiles, respectively. The lines extending below and above the boxes represent the lowest and highest values, respectively, and the circles represent individual data. P value was calculated by the comparison among five different groups of patients with GALT biochemical phenotypes by the Kruskal-Wallis test with post-hoc analysis (D, Duarte variant; G, mutant allele for galactosemia including novel likely pathogenic variant; N, normal allele). It is of note that although there were differences in GALT activity between the G/G and D/G patient groups, the GALT enzyme activities of individual patients were varied with overlapping distributions.