RT Journal Article SR Electronic T1 The “other” COPD JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 659 OP 661 DO 10.1183/09031936.00169913 VO 43 IS 3 A1 MeiLan K. Han YR 2014 UL http://erj.ersjournals.com/content/43/3/659.abstract AB