1. 1Global Initiative for Chronic Obstructive Lung Disease. Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Pulmonary Disease. Updated 2008. http://goldcopd.org/Guidelineitem.asp?l1=2&l2=1&intId=2003 (accessed June 2009).
2. Negative impact of chronic obstructive pulmonary disease on the health-related quality of life of patients. Results of the EPIDEPOC study;Carrasco-Garrido;Health Qual Life Outcomes,2006
3. Exacerbations of COPD: quantifying the patient’s perspective using discrete choice modelling;Haughney;Eur Respir J,2005
4. Patient’s perception of exacerbations of COPD - the PERCEIVE study;Miravitlles;Respir Med,2007
5. Severe acute exacerbations and mortality in patients with chronic obstructive pulmonary disease;Soler-Cataluna;Thorax,2005