Crohn's onset: Most people with Crohn's disease will experience symptoms between 15 and 30 years of age, but onset can occur at any age. Mice with mutations in a Crohn's disease gene require a virus to trigger symptoms, according to a new study. The finding may give insight into why some people with genetic risk variants for complex diseases remain unaffected.' -NIH 2010
Answered 8/15/2014
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