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Four non-invasive methods of sampling DNA from buccal mucosa, simple rinses, scrubbing with cotton balls, scrubbing with toothbrushes and rinses after scrubbing with toothbrushes, were investigated. Scrubbing with toothbrushes yielded 5.79 +/- 5.56 μg of DNA rich in high-molecules, while less than one eighth the amount was recovered by scrubbing with cotton balls. Rinses after scrubbing with toothbrushes...
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