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A randomized, double-blind, placebo-controlled study to compare the immune effects of multiple doses of vitamin D3 in patients with allergic rhinitis/rhino-conjunctivitis caused by birch pollen and in healthy control subjects.

The primary objective is to evaluate whether 2.5 µg VD3 analogue (Zemplar® * Abbvie) in multiple subcutaneously administered doses induces a more favourable (read: anti-inflammatory) systemic immune modulation both in general parameters and allergen…

A randomized, double-blind, placebo-controlled, study to determine the added value of vitamin D3 to treatment with subcutaneous immunotherapy (SCIT) in patients with moderate to severe allergic rhinitis/ rhinoconjunctivitis caused by birch pollen

The aim of this clinical phase IIa randomized, double-blind, placebo-controlled study is to investigate tolerability/ safety and clinical and immunological effects of the addition of a subcuteaneous injection of a VD3 analogue in the vicinity of the…