Fig. 2From: 25-Hydroxyvitamin D levels among 2-year-old children: findings from the Japan environment and Children’s study (JECS)Serum 25-hydroxyvitamin D levels among 2-year-old children in SCS by season. PKruskal–Wallis test < 0.001. All the pairwise Wilcoxon tests showed significant between-group differences in distribution (P < 0.0001), except for spring vs autumn. SCS: Sub-Cohort StudyBack to article page