Regular physical activity modifies smoking-related lung function decline and reduces risk of chronic obstructive pulmonary disease: a population-based cohort study.
Am J Respir Crit Care Med. 2007 Mar 1;175(5):458-63. doi: 10.1164/rccm.200607-896OC. Epub 2006 Dec 7.
Am J Respir Crit Care Med. 2007.
PMID: 17158282