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ModerateRespiratory MedicineCOPD Pharmacotherapyus-abfmus-abimus-usmle-step-2

A 58-year-old man with COPD (mMRC 2, 1 moderate exacerbation last year) continues dyspnea despite tiotropium. No asthma history, eosinophils 80/µL. Best escalation?

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