Datema MR, Zuidmeer-Jongejan L, R A, L B, S B, de Blay F, NG P, T P, Del Prado N, Sinaniotis A, et al. Hazelnut allergy across Europe dissected molecularly: A EuroPrevall outpatient clinic survey. J Allergy Clin Immunol. 2015;136(2):382-91.