That's when Harlan Krumholz of Yale University took the stage, raising the possibility that Zetia might be "an expensive placebo" or even harmful.

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That could have dispersed harmful or even potentially deadly fumes over an area the size of two football fields.

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The rule targets equipment that power plants and manufacturing facilities use to draw in water to prevent overheating, even though those intake systems are not harmful to human health or water quality.

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Natural measles infection, while not harmful to most children, carries a slight risk of permanent disability - or even death.

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Short deadlines can be even more harmful to taxpayers who owe taxes and seek to resolve them with an installment agreement or offer in compromise.

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And Hadza women like symmetry in men's faces even more when they were pregnant or nursing, periods when they may be extra cautious about foods and disease harmful to a child.

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