Saglani S, Lui S, Ullmann N, Campbell GA, Sherburn RT, Mathie SA, Denney L, Bossley CJ, Oates T, Walker SA, Bush A, Lloyd CM. IL-33 promotes airway remodeling in pediatric patients with severe steroid-resistant asthma. Journal of Allergy and Clinical Immunology. 2013 Sep;132(3):676–685.e13. doi: 10.1016/j.jaci.2013.04.012.