Article
Ankylosing spondylitis in Danish and Norwegian twins: occurrence and the relative importance of genetic vs. environmental effectors in disease causation
1 Jan 2008
Abstract excerpt
OBJECTIVE: To estimate the influence of genetic effects in the aetiology and pathogenesis of ankylosing spondylitis (AS). METHODS: The study comprised one Norwegian and two Danish nationwide twin surveys. In 1994 and 2002, respectively, 37,388 and 46,331 Danish twin individuals were asked by questionnaire if they had AS. Similarly, in 1998, 12,718 Norwegian twins were asked if they had AS using a questionnaire...
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