bronchitis, pneumonia/bronchiolitis, chronic obstructive pulmonary disease, tumour/neoplasm, pulmonary embolism, congestive heart failure, vocal cord dysfunction, or viral lower respiratory tract infection) should be ruled out and may require additional tests. For the patient with a probable diagnosis of asthma after initial evaluation (i.e., symptomatic with normal spirometry and no alternative diagnosis), presumptive treatment may be necessary to reach a final diagnosis. Referral to a specialist may be…
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