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Eriksson, Göran, Calverley, Peter M, Jenkins, Christine R, Anzueto, Antonio R, Make, Barry J, Lindberg, Magnus, Fagerås, Malin and Postma, Dirkje S
(2017)
The effect of COPD severity and study duration on exacerbation outcome in randomized controlled trials.
International journal of chronic obstructive pulmonary disease, 12.
pp. 1457-1468.