Sublingual immunotherapy for allergic respiratory diseases: an evaluation of meta-analyses.

Background: Five published meta-analyses (MAs) seem to prove the efficacy of sublingual immunotherapy in allergic asthma and rhinoconjunctivitis.

Objective: We aimed to assess the consistency, magnitude, and robustness of the results of these MAs.

Methods: The data reported in the MAs were checked with the data reported in the original studies.