"Can do, don't do" are not the lazy ones: a longitudinal study on physical functioning in patients with COPD.
Noriane Andrina SieviThomas BrackMartin H BrutscheMartin FreySarosh IraniJörg D LeuppiRobert ThurnheerMalcolm KohlerChristian F ClarenbachPublished in: Respiratory research (2020)
www.ClinicalTrials.gov, NCT01527773.