Fig. 1From: Evaluation of exacerbations and blood eosinophils in UK and US COPD populationsPatient flow. aJan 01, 2014 or Jan 01, 2015; bPatients with at least one COPD diagnosis during the index year period and met the eligibility criteria; cAsthma ICD-9-CM: 493.x, ICD-10-CM: J45x and J46xBack to article page