Can health status questionnaires be used as a measure of physical activity in COPD patients?
Heleen DemeyerIvan Dueñas-EspínCorina De JongZafeiris LouvarisMiek HornikxElena Gimeno-SantosMatthias LoeckxIoannis VogiatzisWim JanssensNicholas S HopkinsonRoberto A RabinovichNiklas KarlssonJudith Garcia-AymerichThierry Troostersnull nullPublished in: The European respiratory journal (2016)