Copd_a_355236 809..819

1Department of Planning and Health Reform, Galician Health Service, Santiago de Compostela, Spain; 2Department of Preventive Medicine and Public Health, School of Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain; 3Department of Pulmonology, University Clinical Teaching Hospital of Santiago de Compostela, Santiago de Compostela, Spain; 4Respiratory Medicine, Alvaro Cunqueiro University Teaching Hospital, Vigo, Spain; 5Consortium for Biomedical Research in Epidemiology and Public Health (CIBER en Epidemiología y Salud Pública/CIBERESP), Madrid, Spain; 6Health Research Institute of Santiago de Compostela (Instituto de Investigación Sanitaria de Santiago de Compostela IDIS), Santiago de Compostela, Spain