@article {Vanfleteren781, author = {Lowie E G W Vanfleteren}, title = {Asymptomatic COPD, until you take it to exertion}, volume = {71}, number = {9}, pages = {781--782}, year = {2016}, doi = {10.1136/thoraxjnl-2016-208863}, publisher = {BMJ Publishing Group Ltd}, issn = {0040-6376}, URL = {https://thorax.bmj.com/content/71/9/781}, eprint = {https://thorax.bmj.com/content/71/9/781.full.pdf}, journal = {Thorax} }