Baker, Emma H 'I'm useless after a bad night's sleep, doctor': could sleep be the key to improving physical activity in people with COPD? [electronic resource] - Thorax 08 2017 - 677-678 p. digital Publication Type: Editorial; Comment ISSN: 1468-3296 Standard No.: 10.1136/thoraxjnl-2016-209905 doi Subjects--Topical Terms: ExerciseHumansPulmonary Disease, Chronic ObstructiveSleep