When women have defective mitochondria, their children can inherit terrible, sometimes fatal problems. A new technology could help. PBS News Hour learns more from our Jeffrey Kahn

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To understand if a new treatment for an illness is really better than older treatments, doctors and researchers look to the best available evidence. Health professionals want a “last word” in evidence to settle questions about what the best modes of treatment are

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Aaron Carroll: it will most likely be even harder to change the public’s expectations. For decades, we’ve been told, over and over, that more screening is better, that early detection is the key to a cure. That’s true, up to a point. We seem to have passed that point, though, and more and more experts are trying to reverse course

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A controversial recommendation last year by the American College of Physicians, which represents the nation’s internists, strongly urged that doctors stop routinely performing the invasive exam on women without symptoms and who are not pregnant

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