Cutoff value of serum 25-hydroxyvitamin D leading to vitamin D deficiency for children in Japan
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The 25-hydroxyvitamin D [25(OH)D] level and clinical symptoms are used to diagnose vitamin D deficiency (VDD). The current 25(OH)D cutoff value is based on biochemical findings, such as elevated parathyroid hormone (PTH) levels, rather than clinical symptoms. ... ...
