The Outlook article 'Early warning system' (Nature 513, S4–S6; 2014) wrongly said that a low-dose CT scan gives the same radiation exposure as one transatlantic flight. In fact, radiation on such a flight is ∼50 microsieverts, 30 times less than from a low-dose scan.
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The online version of the original article can be found at 10.1038/513S4a
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Correction. Nature 514, 168 (2014). https://doi.org/10.1038/514168g
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DOI: https://doi.org/10.1038/514168g
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