Original Research

Incidence of utilization- and symptom-defined COPD exacerbations in hospital- and population-recruited patients

Erdal M, Johannessen A, Eagan TM, Bakke P, Gulsvik A, Grønseth R

International Journal of Chronic Obstructive Pulmonary Disease 2016, 11:2099-2108

Published Date: 2 September 2016