Authors' response
Thorax, 2012-09, Vol.67 (9), p.832 [Peer Reviewed Journal]Copyright: 2012 (c) 2012, Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions. ;ISSN: 0040-6376 ;EISSN: 1468-3296 ;DOI: 10.1136/thoraxjnl-2011-200980 ;CODEN: THORA7
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