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Asthma controller therapy prescription, by asthma severity, for 635 children ≤ 14 years old. Children had not been prescribed an asthma controller medication in the prior 6 months. Data were derived from the UK General Practice Research Database. Asthma severity was defined by physicians according to GINA guidelines 2005 [9]. *Missing asthma severity classification. ICS = inhaled corticosteroid; LABA = long-acting β2-agonist; LTRA = leukotriene receptor antagonist
