1. Quantifying physical activity in COPD: different measures for different purposes. Issue 5 (28th April 2009) Authors: Langer, D; Pitta, F; Troosters, T; Burtin, C; Decramer, M; Gosselink, R Journal: Thorax Issue: Volume 64:Issue 5(2009) Page Start: 458 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗