@article {10368, title = {Should the number of acute exacerbations in the previous year be used to guide treatments in COPD? }, journal = {European Journal of Epidemiology}, volume = {35}, year = {2020}, pages = {To appear}, author = {Sadatsafavi, M and McCormack, J and Lee, TY and Petkau, J and Lynd, L and Sin, D} }