Multidimensional endotyping in patients with severe asthma reveals inflammatory heterogeneity in matrix metalloproteinases and chitinase 3–like protein 1 by Hinks, T, Brown, T, Lau, L, Rupani, H, Barber, C, Elliott, S, Ward, J, Ono, J, Ohta, S, Izuhara, K, Djukanović, R, Kurukulaaratchy, R, Chauhan, A, Howarth, P