East-West gradient in the incidence of inflammatory bowel disease in Europe: the ECCO-EpiCom inception cohort. - Burisch, J.; Pedersen, N.; Cukovic-Cavka, S.; Brinar, M.; Kaimakliotis, I.; Duricova, D.; Shonová, O.; Vind, I.; Avnstrøm, S.; Thorsgaard, N.; Andersen, V.; Krabbe, S.; et al. (Gut (0017-5749), 2014)