title: The prevalence of pulmonary embolism in acute exacerbations of COPD.
authors: Sami
authors: S
authors: Simons
authors: Erik
authors: E
authors: van der Heijden
authors: Yvonne
authors: Y
authors: Heijdra
mesh_terms: D015897:Comorbidity; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D011379:Prognosis; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis / Q000453:epidemiology*; D011655:Pulmonary Embolism / Q000175:diagnosis* / Q000453:epidemiology*; D012008:Recurrence; D018570:Risk Assessment; D012720:Severity of Illness Index; D015996:Survival Rate