Immune-modulatory effect of probiotic Bifidobacterium lactis NCC2818 in individuals suffering from seasonal allergic rhinitis to grass pollen: an exploratory, randomized, placebo-controlled clinical trial. - Singh A; Hacini-Rachinel F; Gosoniu ML; Bourdeau T; Holvoet S; Doucet-Ladeveze R; Beaumont M; Mercenier A; Nutten S (European Journal of Clinical Nutrition, 2013)