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The incidence of inherited porphyrias in Europe
Retrospective estimates of the prevalence of porphyrias have been reported but there has been no large scale prospective study of their incidence. The European Porphyria Network collected informationExpand
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Confidence intervals and power calculations for within-person biological variation: effect of analytical imprecision, number of replicates, number of samples, and number of individuals.
BACKGROUND Reliable estimates of within-person biological variation and reference change value are of great importance when interpreting test results, monitoring patients, and setting qualityExpand
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Preanalytical quality improvement: from dream to reality
Abstract Laboratory diagnostics (i.e., the total testing process) develops conventionally through a virtual loop, originally referred to as “the brain to brain cycle” by George Lundberg. ThroughoutExpand
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A multicentre study of reference intervals for haemoglobin, basic blood cell counts and erythrocyte indices in the adult population of the Nordic countries
Eight haematological quantities were measured in EDTA anticoagulated venous blood specimens collected from 1826 healthy male and female individuals between 18 and 90 years of age in the NordicExpand
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[Current issues in measurement and reporting of urinary albumin excretion].
Urinary excretion of albumin indicates kidney damage and is recognized as a risk factor for progression of kidney disease and cardiovascular disease. The role of urinary albumin measurements hasExpand
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Weekly and 90-minute biological variations in cardiac troponin T and cardiac troponin I in hemodialysis patients and healthy controls.
BACKGROUND Myocardial infarction (MI) is diagnosed by the finding of a single cardiac troponin value above the 99th percentile and a significant time-dependent change in cardiac troponinExpand
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Defining analytical performance specifications: Consensus Statement from the 1st Strategic Conference of the European Federation of Clinical Chemistry and Laboratory Medicine
*Corresponding author: Sverre Sandberg, Norwegian Quality Improvement of Primary Care Laboratories (Noklus), Institute of Global Public Health and Primary Health Care, University of Bergen andExpand
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Preanalytical quality improvement: in quality we trust
Abstract Total quality in laboratory medicine should be defined as the guarantee that each activity throughout the total testing process is correctly performed, providing valuable medicalExpand
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A checklist for critical appraisal of studies of biological variation
Abstract Data on biological variation are used for many purposes in laboratory medicine but concern exists over the validity of the data reported in some studies. A critical appraisal checklist hasExpand
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The Index of Individuality Is Often a Misinterpreted Quantity Characteristic
Abstract The concept of the “index of individuality” was introduced by Eugene Harris in 1974. The index of individuality, calculated as (CVA 2 + CVI 2)1/2/CVG, where CvA, CvI, and CvG are analytical,Expand
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