RT Journal Article SR Electronic T1 COPD (confusion over proper diagnosis) in the zone of maximum uncertainty JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1523 OP 1524 DO 10.1183/13993003.01295-2015 VO 46 IS 5 A1 Philip H. Quanjer A1 Gregg Ruppel A1 Vito Brusasco A1 Rogelio PĂ©rez-Padilla A1 Carlos A. Vaz Fragoso A1 Bruce H. Culver A1 Maureen P. Swanney A1 Martin R. Miller A1 Bruce Thompson A1 Mike Morgan A1 Mike Hughes A1 Brian L. Graham A1 Riccardo Pellegrino A1 Paul Enright A1 A. Sonia Buist A1 Peter Burney YR 2015 UL http://erj.ersjournals.com/content/46/5/1523.abstract AB