Verleden, S. E. et al. Small airways pathology in idiopathic pulmonary fibrosis: a retrospective cohort study. Lancet Respir. Med. 8,...
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Burney, P. G., Patel, J., Newson, R., Minelli, C. & Naghavi, M. Global and regional trends in COPD mortality, 1990-2010....