(European Respiratory Society, 2018) Demeyer, Heleen; Costilla-Frias, Marcos; Louvaris, Zafeiris; Gimeno Santos, Elena, 1980-; Tabberer, Maggie; Rabinovich, Roberto A.; de Jong, Corina; Polkey, Michael I.; Hopkinson, Nicholas S.; Karlsson, Niklas; Serra, Ignasi; Vogiatzis, Ioannis; Troosters, Thierry; García Aymerich, Judith; PROactive consortium