Measurement of spirometry, that: (a) involves a permanently recorded tracing, performed before and after inhalation of a bronchodilator; and (b) is performed to confirm diagnosis of: (i) asthma; or (ii) chronic obstructive pulmonary disease (COPD); or (iii) another cause of airflow limitation; each occasion at which 3 or more recordings are made Applicable only once in any 12 month period