Recommendations for epidemiological studies on COPD
P.S. Bakke, E. Rönmark, T. Eagan, F. Pistelli, I. Annesi-Maesano, M. Maly, M. Meren, P. Vermeire, J. Vestbo, G. Viegi, J. Zielinski, B. Lundbäck
European Respiratory Journal Dec 2011, 38 (6) 1261-1277; DOI: 10.1183/09031936.00193809