Figure 2From: Sustained efficacy and safety of a 300IR daily dose of a sublingual solution of birch pollen allergen extract in adults with allergic rhinoconjunctivitis: results of a double-blind, placebo-controlled studyPatient disposition. Patients were randomized to receive either placebo or 300IR sublingual solution of birch allergen extract initiated approximately 4 months before the birch pollen season and continued through it. Patients were treated discontinuously for two consecutive years.Back to article page