PT - JOURNAL ARTICLE AU - Louisa Gnatiuc AU - Gaetano Caramori TI - COPD in nonsmokers: the biomass hypothesis – to be or not to be? AID - 10.1183/09031936.00029114 DP - 2014 Jul 01 TA - European Respiratory Journal PG - 8--10 VI - 44 IP - 1 4099 - http://erj.ersjournals.com/content/44/1/8.short 4100 - http://erj.ersjournals.com/content/44/1/8.full SO - Eur Respir J2014 Jul 01; 44