PT - JOURNAL ARTICLE ED - , TI - <em>ERJ</em> Podcast October 2018: Causal inference studies AID - 10.1183/13993003.E5204-2018 DP - 2018 Oct 01 TA - European Respiratory Journal PG - 18E5204 VI - 52 IP - 4 4099 - http://erj.ersjournals.com/content/52/4/18E5204.short 4100 - http://erj.ersjournals.com/content/52/4/18E5204.full SO - Eur Respir J2018 Oct 01; 52