us-abfm MCQ (SBA): Asthma Diagnosis

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ModerateRespiratory MedicineAsthma Diagnosisus-abfmus-usmle-step-2

A 49-year-old with suspected asthma has normal spirometry between episodes. What test can help confirm variable airflow limitation?

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us-abfm MCQ: Asthma Diagnosis — Answer & Explanation | iatroX