RT Journal Article SR Electronic T1 Severe asthma: phenotyping to endotyping or vice versa? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1700053 DO 10.1183/13993003.00053-2017 VO 49 IS 2 A1 Alberto Papi A1 Marina Saetta A1 Leonardo Fabbri YR 2017 UL http://erj.ersjournals.com/content/49/2/1700053.abstract AB