Fig. 5From: Vitamin D status in healthy Italian school-age children: a single-center cross-sectional studyPercentage of children by serum 25-hydroxyvitamin D [25(OH)D] level for age groups. The labels above each column refer to the number of children in each age category. The age-range goes from 6 to 10Â years. As expected for such a small age range, there are no significant differences on the distribution of 25(OH)D levels compared by ageBack to article page