Thorax Recercat. Dipósit de la Recerca de Catalunya instname Gimeno-Santos, E, Frei, A, Steurer-Stey, C, de Batlle, J, Rabinovich, R A, Raste, Y, Hopkinson, N S, Polkey, M I, van Remoortel, H, Troosters, T, Kulich, K, Karlsson, N & Puhan, M A & Garcia-Aymerich, J 2014, ' Determinants and outcomes of physical activity in patients with COPD : a systematic review ', Thorax, vol. 69, no. 8, pp. 731-9 . https://doi.org/10.1136/thoraxjnl-2013-204763 Thorax, 69(8), 731-9. BMJ PUBLISHING GROUP