Isabell Ricklefs, Ioanna Barkas, Melody G. Duvall, Manuela Cernadas, Nicole L. Grossman, Elliot Israel, Eugene R. Bleecker, Mario Castro, Serpil C. Erzurum, John V. Fahy, Benjamin M. Gaston, Loren C. Denlinger, David T. Mauger, Sally E. Wenzel, Suzy A. Comhair, Andrea M. Coverstone, Merritt L. Fajt, Annette T. Hastie, Mats W. Johansson, Michael C. Peters, Brenda R. Phillips, Bruce D. Levy, the National Heart Lung and Blood Institute’s Severe Asthma Research Program- Investigators