RT Journal Article SR Electronic T1 ERJ Podcast October 2018: Causal inference studies JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 18E5204 DO 10.1183/13993003.E5204-2018 VO 52 IS 4 YR 2018 UL http://erj.ersjournals.com/content/52/4/18E5204.abstract AB