Genetic variation in the 5q31 cytokine gene cluster confers susceptibility to Crohn disease. Rioux JD, Daly MJ, Silverberg MS, et al. Genetic variation in the 5q31 cytokine gene cluster confers susceptibility to Crohn disease. Nat Genet. 2001;29(2):223-8. doi:10.1038/ng1001-223 Read more