<style face="normal" font="default" size="100%">Study investigating the generalisability of a COPD trial based in primary care (Salford Lung Study) and the presence of a Hawthorne effect</style>

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31<style face="normal" font="default" size="100%">Study investigating the generalisability of a COPD trial based in primary care (Salford Lung Study) and the presence of a Hawthorne effect</style><style face="normal" font="default" size="100%">Study investigating the generalisability of a COPD trial based in primary care (Salford Lung Study) and the presence of a Hawthorne effect</style>