Gedebjerg, A., Szépligeti, S., Wackerhausen, L., Horváth-Puhó, E., Dahl, R., Hansen, J., … Thomsen, R. (2018). Prediction of mortality in patients with chronic obstructive pulmonary disease with the new Global Initiative for Chronic Obstructive Lung Disease 2017 classification: a cohort study. The Lancet. Respiratory Medicine. https://doi.org/10.1016/S2213-2600(18)30002-X (Original work published 2018)