RT Journal Article SR Electronic T1 Randomised controlled trials and real-life studies: two answers for one question JF European Respiratory Review JO EUROPEAN RESPIRATORY REVIEW FD European Respiratory Society SP 180080 DO 10.1183/16000617.0080-2018 VO 27 IS 149 A1 Sergio Harari YR 2018 UL http://err.ersjournals.com/content/27/149/180080.abstract AB