RT Journal Article SR Electronic T1 COPD in nonsmokers: the biomass hypothesis – to be or not to be? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 8 OP 10 DO 10.1183/09031936.00029114 VO 44 IS 1 A1 Louisa Gnatiuc A1 Gaetano Caramori YR 2014 UL http://erj.ersjournals.com/content/44/1/8.abstract AB