Factors associated with poor pulmonary function: cross-sectional analysis of data from the ERCF
J. Navarro, M. Rainisio, H.K. Harms, M.E. Hodson, C. Koch, G. Mastella, B. Strandvik, S.G. McKenzie
European Respiratory Journal Aug 2001, 18 (2) 298-305; DOI: 10.1183/09031936.01.00068901