Urinary BH4, BH2 concentrations, BH4/BH2 ratios and Biopterin concentration in each group on enrollment (Kruskal-Wallis: p<0.001). Horizontal bars represent pairwise comparisons between disease groups.

<p>A. Urine BH4 (μmol/mmol creatinine) concentrations in each group on enrollment. Horizontal lines indicate median values for each group. B. Urine BH2 (μmol/mmol creatinine) concentrations in each group on enrollment. Horizontal lines indicate median values for each group. C. BH4/BH2 ratio in each group on enrollment. Horizontal lines indicate median values for each group. D. Urine Biopterin (μmol/mmol creatinine) concentrations in each group on enrollment. Horizontal lines indicate median values for each group. Horizontal bars represent pairwise comparisons between disease groups.