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PMC:7589163 / 28734-29628
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{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7589163","sourcedb":"PMC","sourceid":"7589163","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7589163","text":"A 2016 study [111] combined data from 14 European population studies, including children, adolescents, and adults, and found an estimated prevalence of insufficient vitamin D levels of 13% in the general population. The prevalence according to age in pediatric populations varied from 4%–7% (1–6 years), 1%–8% (7–14 years) and 12%–40% (15–18 years). Italian data usually regards smaller populations and reports a high prevalence of vitamin D deficiency and insufficiency. A 2014 study from Stagi and colleagues found a 30% prevalence of vitamin D insufficiency in Italian children and adolescents and a 58.7% prevalence of vitamin D deficiency [112]. In the same year, Vierucci and colleagues reported a prevalence of 32.3% insufficiency and 49.9% deficiency [113]. Cadario et al. [114] described in Italian newborns a high frequency of vitamin D deficiency (40.1%) and severe deficiency 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