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Govt stops study seeking to prevent type of stroke

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WASHINGTON (AP) — The government has halted a study testing treatments for a brain condition that can cause strokes after early results suggested invasive therapies were riskier than previously thought. The condition involves a kind of tangle in the brain called an arteriovenous malformation, or AVM. Arteries and veins grow knotted together until eventually some of them burst, causing a...

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