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Although cross-sectional studies have reported that the prevalence of allergy is reduced on a farm, few prospective studies were carried out on adults. We examined the association of experience of farming with occurrence of cedar pollinosis in a prospective cohort in Japan.A total of 5,698 men and 6,533 women, aged 35 to 69 at baseline in 1992, participated in the Takayama Study, a population-based...
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