Figure 1From: Polymorphisms in NFkB, PXR, LXR and risk of colorectal cancer in a prospective study of Danes A flow chart showing the selection of study subjects. Between December 1993 and May 1997, 160,725 individuals aged 50 to 64 years, born in Denmark, living in the Copenhagen and Aarhus areas and having no previous cancers at the time of invitation, were invited to participate in the study. Please refer to Methods for further details.Back to article page