Biological exacerbation clusters demonstrate asthma and COPD overlap with distinct mediator and microbiome profiles. - Ghebre, MA; Pang, PH; Diver, S; Desai, D; Bafadhel, M; Haldar, K; Kebadze, T; Cohen, S; Newbold, P; Rapley, L; Woods, J; Rugman, P; et al. (Journal of Allergy and Clinical Immunology, 2018)