1. Global Initiative for Chronic Obstructive Lung Disease. Global Strategy for the Diagnosis, Management and Prevention of Chronic Obstructive Pulmonary Disease. NHLBI/WHO working meeting. Available from: www.goldcopd.com
2. Standards for the diagnosis and treatment of patients with COPD: a summary of the ATS/ERS position paper;Celli;Eur Respir J,2004
3. Skeletal muscle dysfunction in chronic obstructive pulmonary disease: a statement of the American Thoracic Society and European Respiratory Society;American Thoracic Society;Am J Respir Crit Care Med,1999
4. Quadriceps strength predicts mortality in patients with moderate to severe chronic obstructive pulmonary disease;Swallow;Thorax,2007
5. Skeletal muscle adaptation to disease states;Gea,2006