PT - JOURNAL ARTICLE AU - Esteban, C. AU - Quintana, J.M. AU - Aburto, M. AU - Moraza, J. AU - Egurrola, M. AU - Pérez-Izquierdo, J. AU - Aizpiri, S. AU - Urko, A. AU - Capelastegui, A. TI - Impact of changes in physical activity on health-related quality of life among patients with chronic obstructive pulmonary disease AID - 10.1183/09031936.00021409 DP - 2010 Jan 14 TA - European Respiratory Journal 4099 - http://erj.ersjournals.com/content/early/2010/01/14/09031936.00021409.short 4100 - http://erj.ersjournals.com/content/early/2010/01/14/09031936.00021409.full