ANSWER:

• History revealed that he was diagnosed with asthma 2 years prior to presentation. Was put on Advair (fluticasone plus salmeterol) that controlled his symptoms.
• Parents noticed progressive exercise intolerance. Overall, he tires quickly and does not participate in physical sports as his peers. He complains of shortness of breath bythe end of the second flight of stairs.
• A record of his previous pulmonary function tests is shown below