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Standardization of measurements of 25-hydroxyvitamin D3 and D2
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Vitamin D status as an international issue: national surveys and the problem of standardization
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An appeal to medical journal editors : the need for a full description of laboratory methods and specimen handling in clinical study reports
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Performance evaluation of a turbidimetric cystatin C assay on different high-throughput platforms
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How to establish glomerular filtration rate in children
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Acute kidney injury: Epidemiology and assessment
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Trueness verification in European external quality assessment schemes: time to care about the quality of the samples
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Quality specifications for reference methods.
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Standardization of ionized magnesium by correlation with total magnesium.
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Assessment of the state-of-the-art trueness and precision of serum total-calcium and glucose measurements in Finnish laboratories : the QSL-Finland study