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Matti Narkia

Vitamin D Testing Errors Continue - The Vitamin D Cure Blog » Blog Archive - 0 views

    "A recent article in the New York Times highlighted an ongoing problem with the accuracy of vitamin D testing at the largest commercial clinical laboratory, Quest Diagnostics. It has become clear from shared experience among vitamin D experts, including myself, that Quest Diagnostics has a problem with seemingly random over-estimation of vitamin D levels."
Matti Narkia

Measuring 25-hydroxyvitamin D in a clinical environment: challenges and needs -- Hollis... - 0 views

    Measuring 25-hydroxyvitamin D in a clinical environment: challenges and needs.
    Hollis BW.
    Am J Clin Nutr. 2008 Aug;88(2):507S-510S. Review.
    PMID: 18689391

    In this article, I provide an overview of the techniques available for measuring 25(OH)D, compare these techniques with one another, and assess their clinical utility. I also briefly discuss the stability of 25(OH)D in biological media and present an overview of the Vitamin D External Quality Assessment Scheme.
Matti Narkia

SI Units for Clinical Data - conversion factors - 0 views

    The following table provides factors for converting conventional units to SI units for selected clinical data. Source: JAMA Author Instructions.
    Contains also conversion factors for circulating form of vitamin D, 25(OH)D (calcidiol).
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