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Tobacco use is massively entrenched in developing countries, where one of the biggest worries is the rise of smoking among women.
Scientists said Friday they had developed a revolutionary "spray-on skin" treatment for venous leg ulcers -- a common ailment involving a shallow, open and stubborn wound on the ankle or lower leg.
A third of the world's adults are physically inactive, and the couch potato lifestyle kills about five million people every year.
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