TY - JOUR T1 - Comment on: International ERS/ATS guidelines on definition, evaluation and treatment of severe asthma JF - European Respiratory Journal JO - Eur Respir J SP - 266 LP - 266 DO - 10.1183/09031936.00037214 VL - 44 IS - 1 AU - David L. Hahn Y1 - 2014/07/01 UR - http://erj.ersjournals.com/content/44/1/266.abstract N2 - To the Editor:I was pleased to see that the new guidelines on severe asthma use the GRADE (Grading of Recommendations, Assessment, Development and Evaluation) system to classify the strength of evidence behind each expert recommendation [1]. The fact that the strength of most of the recommendations was “conditional” (i.e. many patients and clinicians might choose an … ER -