?:definition
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Immunoassay reagents intended to perform qualitative and/or quantitative analyses on a body fluid sample (e.g., serum) to determine 25-hydroxyvitamin D (25-OH-D), a metabolite of both vitamin D2 and D3. These assays are not designed to differentiate between D2 and D3 metabolites; a large number of bone and mineral metabolism disorders are associated with abnormal levels of 25-OH-D, including hypocalcaemia and osteomalacia
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