Severe exacerbations in moderate-to-severe asthmatics are associated with increased pro-inflammatory and type 1 mediators in sputum and serum oleh Michael A. Ghebre, Pee Hwee Pang, Dhananjay Desai, Beverley Hargadon, Chris Newby, Joanne Woods, Laura Rapley, Suzanne E. Cohen, Athula Herath, Erol A. Gaillard, Richard D. May, Chris E. Brightling