Byrom, Bill Measuring free-living physical activity in COPD patients: Deriving methodology standards for clinical trials through a review of research studies. [electronic resource] - Contemporary clinical trials Mar 2016 - 172-84 p. digital Publication Type: Journal Article; Review ISSN: 1559-2030 Standard No.: 10.1016/j.cct.2016.01.006 doi Subjects--Topical Terms: AccelerometryClinical Trials as Topic--methodsExerciseHumansMonitoring, Ambulatory--methodsPulmonary Disease, Chronic Obstructive--physiopathologySedentary Behavior