| http://www.w3.org/ns/prov#value | - Numerous studies conducted in Europe, India, and the United States have identified a link between low vitamin D levels and higher rates of Crohn's disease, ulcerative colitis, and other forms of IBD. Based on this cohort of research, populations where natural sunlight exposure is limited tend to have higher rates of IBD, and vice versa (http://www.vitamindcouncil.org).4) Influenza.
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