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PURPOSE To achieve clinical validation of cutoff values for newborn screening by tandem mass spectrometry through a worldwide collaborative effort. METHODS Cumulative percentiles of amino acids and acylcarnitines in dried blood spots of approximately 25–30 million normal newborns and 10,742 deidentified true positive cases are compared to assign clinical(More)
OBJECTIVE To determine the biochemical screening rate of newborns in South Australia and the factors associated with babies not being screened. DESIGN Matching of data in the SA Newborn Screening Centre database (acquired from Guthrie cards) with the SA perinatal data collection (compiled from supplementary birth records) to determine how many newborns(More)
but the cystatin C values in hyperthy-roidism are 46% higher than those in hypothyroidism. Existing literature suggests that it is creatinine that is providing the correct assessment of GFR changes (17), but because definitive work formally assessing GFR in thyroid disease (using a " gold standard " marker) has yet to be performed, this cannot be stated(More)
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