Recent trends in COPD prevalence in Spain: a repeated cross-sectional survey 1997–2007
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J. Soriano | M. Miravitlles | J. Masa | J. Ancochea | J. B. Soriano | F. García-Río | C. Villasante | J. Viejo | E. Durán-Tauleria | C. Jiménez-Ruiz | L. Fernández-Fau | G. Sánchez | L. Muñoz | V. Sobradillo-Peña | Luis Muñoz | Guadalupe Sánchez