PT - JOURNAL ARTICLE AU - Lowie E G W Vanfleteren TI - Asymptomatic COPD, until you take it to exertion AID - 10.1136/thoraxjnl-2016-208863 DP - 2016 Sep 01 TA - Thorax PG - 781--782 VI - 71 IP - 9 4099 - http://thorax.bmj.com/content/71/9/781.short 4100 - http://thorax.bmj.com/content/71/9/781.full SO - Thorax2016 Sep 01; 71