ADDITION Stroke Brain Stents

This undated photo provided by Covidien, part of Minneapolis-based Medtronic Inc., shows their stent used to clear blood clots in the brain that cause strokes. The American Heart Association has endorsed using removable stents to open clogged arteries causing a stroke. It’s the first new stroke treatment to be backed by the group in nearly 20 years and the first device ever recommended for this purpose. (Stan Sholik/Covidien, Medtronic, via AP)

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