Corrections

"Counterintuitive Toxicity" (SN: 1/20/07, p. 40) should not have attributed "Conceptually, [low-dose radiation] is analogous to a vaccine," to J. Leslie Redpath. That was the writer's comparison. "Perchance to Hibernate" (SN: 1/27/07, p. 56) described an enzyme's concentration in livers taken from animals. In fact, Hannah Carey's team measured the enzyme, lactate dehydrogenase, in a solution that had passed through liver tissue.

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