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Correspondence
Explaining differential effects of tiotropium on mortality in COPD

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Footnotes

  • Competing interests BJL has received placebo inhalers as an unrestricted educational gift from Boehringer Ingelheim, payment from Boehringer to attend an Advisory Board and financial support from Boehringer to attend the Winter British Thoracic Society meeting 2012. PMS received financial support from Boehringer Ingelheim to attend the European Respiratory Society meeting in 2009.

  • Provenance and peer review Not commissioned; internally peer reviewed.

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