“…The following studies contained inclusion criteria that required a history of an exacerbation in the 12 months prior to randomisation [18, 19, 21-23, 25, 27-29]. The risk of severe exacerbation (AIR versus traditional algorithm) was reported as relative rate [6, 15, 16, 19, 21, 23-25, 27, 29], relative risk [7,17,28] and hazard ratio [18,22], respectively. Studies prescribed reliever therapy as follows; budesonide/formoterol (B/F) 200/6 μg, one actuation as required for relief of symptoms [6,7,15,16,19,21,22,24,25,[27][28][29]; B/F 100/6 μg, one actuation as required for relief of symptoms [17,18]; ultrafine beclometasone dipropionate/formoterol 100/6 μg (BDP/F), one actuation as required for relief of symptoms [23].…”