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↵* Information provided by author.
↵‡ GSK Clinical Trials Registry. http://ctr.glaxowellcome.co.uk/Summary/salmeterol/studylist.asp (SLGA5011 SMART) (accessed 24 Jul 06).
For correspondence: Dr P M Dorinsky, GlaxoSmithKline, Research Triangle Park, NC, USA.
Source of funding: GlaxoSmithKline.