Urwyler P, Hussein NA, Bridevaux PO, Chhajed PN, Geiser T, Grendelmeier P, et al. Predictive factors for exacerbation and reexacerbation in chronic obstructive pulmonary disease: an extension of the Cox model to analyze data from the Swiss COPD cohort. Multidiscip Respir Med [Internet]. 2019 Feb. 5 [cited 2024 Jul. 7];14(1). Available from: https://mrmjournal.org/index.php/mrm/article/view/6