RT Journal Article SR Electronic T1 Does educational level influence lung function decline (Doetinchem Cohort Study)? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00111608 A1 Tabak, C. A1 Spijkerman, A.M.W. A1 Verschuren, W.M.M. A1 Smit, H.A. YR 2009 UL http://erj.ersjournals.com/content/early/2009/06/18/09031936.00111608.abstract AB