RT Journal Article SR Electronic T1 Predicting an accelerated lung function decline in smokers: is there a proper threshold? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 308 OP 309 DO 10.1183/09031936.00102013 VO 43 IS 1 A1 Reinier P. Akkermans A1 Marion Biermans A1 Bas Robberts A1 Gerben ter Riet A1 Annelies Jacobs A1 Chris van Weel A1 Michel Wensing A1 Tjard Schermer YR 2014 UL http://erj.ersjournals.com/content/43/1/308.abstract AB