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Prevalence of allergen sensitizations by positive skin prick test (SPT +) to the different allergens are shown at baseline and after a year for the whole cohort. Dust mites dermatophagoides pteronyssinus (DP) and dermatophagoides farina (DF); feather mix (Feath); cockroach (Cockr); cat pelt; dog epithelium; pollens of grass mix; weed mix, olive and cypress trees. Statistical p values <0.05 (*), <0.01 (**), and <0.001 (***). McNemar’s test.
