• Leuven is in Belgium, not the Netherlands as stated in the story on bee police (4 November, p 16).
• Andrew Mackie is not employed by the British government (11 November, p 40). He is a public analyst for Edinburgh City Council.
• Duchenne muscular dystrophy is 10 times as common as stated in our article on a potential stem-cell treatment for the condition (18 November, p 12). Around 1 in 3500 children are affected by MD.
• In the item on the discovery of a natural painkiller (18 November, p 21), both figures quoted in grams per kilogram of body weight were in fact milligrams per kilogram of body weight.
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• Myron Ebell is director of energy and global warming policy at the Competitive Enterprise Institute, Washington DC. Contrary to what we stated in our climate change special report (4 November, p 18), he has never been a climate negotiator for George W. Bush’s administration.
