Fig. 1From: A preseason booster prolongs the increase of allergen specific IgG4 levels, after basic allergen intralymphatic immunotherapy, against grass pollen seasonal allergyGrass allergic patients were treated with ILIT and then randomized double blind to an active or placebo ILIT booster dose after 1 year. Questionnaires were completed during the pollen seasons and blood samples for IgG4 measurements were obtained at several occasionsBack to article page