(Public Library of Science (PLoS), 2016) Demeyer, Heleen; Gimeno Santos, Elena, 1980-; Rabinovich, Roberto A.; Hornikx, Miek; Louvaris, Zafeiris; de Boer, Willem I.; Karlsson, Niklas; de Jong, Corina; van der Molen, Thys; Vogiatzis, Ioannis; Janssens, Wim; García Aymerich, Judith; Troosters, Thierry; Polkey, Michael I.; PROactive consortium