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Science 9 November 1979:
Vol. 206. no. 4419, p. 639
DOI: 10.1126/science.206.4419.639-a
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Erratum

A News and Comment briefing, "Carcinogens in Scotch" (24 Aug., p. 769), incorrectly reported that carrot and beet juice contain relatively high levels of nitrosamines. So far as is known, they do not. They do contain nitrates and nitrites, the precursors of nitrosamines.

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