Diener H-C. Randomised controlled trial: Acupuncture prophylaxis of migraine no better than sham acupuncture for decreasing frequency of headaches. Evid Based Med 2013;18:33–34, doi:10.1136/eb-2012-100723. This article was published in print with an incorrect DOI. The DOI should be 10.1136/ebmed-2012-100723 as this is the DOI it was published online first with.