1. Validity and responsiveness of the Daily- and Clinical visit-PROactive Physical Activity in COPD (D-PPAC and C-PPAC) instruments. Issue 3 (21st January 2021) Authors: Garcia-Aymerich, Judith; Puhan, Milo A; Corriol-Rohou, Solange; de Jong, Corina; Demeyer, Heleen; Dobbels, Fabienne; Erzen, Damijan; Frei, Anja; Gimeno-Santos, Elena; Hopkinson, Nicholas S; Ivanoff, Nathalie; Karlsson, Niklas; Louvaris, Zafeiris; Polkey, Michael I; Rabinovich, Roberto A; Scuri, M... Other Names: author non-byline.; Ivanoff Nathalie author non-byline.; Karlsson Niklas author non-byline.; Corriol-Rohou Solange author non-byline.; Jarrod Ian author non-byline.; Erzen Damijen author non-byline.; Scuri Mario author non-byline.; Montaccini Roberta author non-byline.; Kamel Nadia author non-by... Journal: Thorax Issue: Volume 76:Issue 3(2021) Page Start: 228 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗