Physical activity in COPD patients: patterns and bouts
David Donaire-Gonzalez, Elena Gimeno-Santos, Eva Balcells, Diego A. Rodríguez, Eva Farrero, Jordi de Batlle, Marta Benet, Antoni Ferrer, Joan A. Barberà, Joaquim Gea, Robert Rodriguez-Roisin, Josep M. Antó, Judith Garcia-Aymerich
European Respiratory Journal Oct 2013, 42 (4) 993-1002; DOI: 10.1183/09031936.00101512