PT - JOURNAL ARTICLE AU - Sergio Harari TI - Randomised controlled trials and real-life studies: two answers for one question AID - 10.1183/16000617.0080-2018 DP - 2018 Sep 30 TA - European Respiratory Review PG - 180080 VI - 27 IP - 149 4099 - http://err.ersjournals.com/content/27/149/180080.short 4100 - http://err.ersjournals.com/content/27/149/180080.full SO - EUROPEAN RESPIRATORY REVIEW2018 Sep 30; 27