Fig. 3From: Effect of vitamin A supplementation on gut microbiota in children with autism spectrum disorders - a pilot studyComparison of food frequencies between Pre-VAI and Post-VAI in the subset group (n = 20). The frequencies of each food type were not significantly different between the Pre-VAI and Post-VAI, except for stems and leafy vegetables. * P < 0.05, using Wilcoxon’s signed rank testsBack to article page