Geographic Variability and Environmental Risk Factors in Inflammatory Bowel Disease

Ng, SC; Bernstein, CN; Vatn, MH; Lakatos, PL [Lakatos, Péter László (Belgyógyászat, ga...), szerző] I. Sz. Belgyógyászati Klinika (SE / AOK / K); Loftus, EV Jr; Tysk, C; O'Morain, C; Moum, B; Colombel, JF; the, Epidemiology and Natural History Task Force of the International Organization of Inflammatory Bowel Disease (IOIBD)