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Correction
CORRECTION
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Incorrect reference details were inserted into reference 21 of the editorial by Wedzicha and Hurst, published in the February issue (Thorax 2007;62:103–104). The reference should not be OpenUrlAbstract/FREE Full Text . The correct reference details are: Eur Respir J, published online before print November 15, 2006 as doi: 10.1183/09031936.00092506.