RT Journal Article SR Electronic T1 The quest for the grail: multidimensional efforts for understanding and targeting severe asthma JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1227 OP 1231 DO 10.1183/13993003.01414-2015 VO 46 IS 5 A1 Mina Gaga A1 Paul L.P. Brand A1 Neil C. Thomson YR 2015 UL http://erj.ersjournals.com/content/46/5/1227.abstract AB