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Laboratory testing for LA

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<strong>Laboratory</strong> <strong>testing</strong> <strong>for</strong> <strong>LA</strong> - Cut-off values :<br />

‣ Ratio of dRVVT screen/confirm:<br />

‣ Similar mean screen/confirm ratios <strong>for</strong> normal specimens <strong>for</strong><br />

all systems (all close to 1.0).<br />

* McGlasson & Fritsma. STH 2013; 39:315-319<br />

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