 Subjects were kept in asthma control during the entire trial 2 years. Except for during 2 evaluation periods of 2 months in autumn 2007 and autumn 2008, subjects used the medications prescribed by their physician. During the 2 evaluation periods of 2 months in autumn 2007 and autumn 2008, subjects used provided and standardised rhinoconjunctivitis and asthma medications. The asthma medication use was to reflect the subjects asthma status. This was done by treatment with a low maintenance dose of control medication supplemented with rescue medication as needed. 