1. Alternative projections of mortality and disability by cause 1990-2020. Global Burden of Disease Study;Murria;Lancet,1997
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. Global Strategy for the Diagnosis, Management, and Prevention of Chronic Obstructive Pulmonary Disease: NHLBI/WHO Workshop (National Heart, Lung, and Blood Institute: Claude Lenfant, MD. World Health Organization: Nikolai Khaltaev), UPDATE 2004 [consultado 7/04/2005]. Disponible en: http://www.goldcopd.com/
4. Global Strategy for Asthma. Management and Prevention. NHLBI/WHO Workshop Report. National Institute of Health, 2002 [consultado 10/01/2004]. Disponible en: http://www.ginasthma.com/
5. Geographic variations in prevalence and underdiagnosis of COPD: results of the IBERPOC multicentric epidemiological study;Sobradillo;Chest,2000