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In the letter “Is approval letter of acupuncture for back pain really evidence based?” by Francisco M Kovacs and María Teresa Gil del Real (11 November, p 1221), we slipped up on the email address, wrongly using two k's. The correct address is mtgildelreal@kovacs.org. Additionally, we struggled with María Teresa Gil del Real's name on the contents page, wrongly assuming her surname to be del Real; it is in fact Gil del Real.
