RT Journal Article SR Electronic T1 Identifying the at risk smokers: who goes on to get COPD? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1901613 DO 10.1183/13993003.01613-2019 VO 54 IS 4 A1 Arina Madan A1 Alice M. Turner YR 2019 UL http://erj.ersjournals.com/content/54/4/1901613.abstract AB