https://www.healthcentral.com/article/what-is-severe-asthma
AsthmaDiagnosis

What is Severe Asthma?

Doctor examining a chest x-ray.
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    John Bottrell

    John Bottrell

    John Bottrell is a registered Respiratory Therapist. He wrote for HealthCentral as a health professional for Asthma and Chronic Obstructive Pulmonary Disease (COPD).