%0 Journal Article %A Emma H Baker %A Daniel R Burrage %T ‘I'm useless after a bad night's sleep, doctor’: could sleep be the key to improving physical activity in people with COPD? %D 2017 %R 10.1136/thoraxjnl-2016-209905 %J Thorax %P thoraxjnl-2016-209905 %U https://thorax.bmj.com/content/thoraxjnl/early/2017/03/16/thoraxjnl-2016-209905.full.pdf