Risk of colorectal cancer in a population-based study 20 years after diagnosis of ulcerative colitis: results from the IBSEN study por Tomm Bernklev, Pasquale Klepp, Stephan Brackmann, Milada Cvancarova, Marte Lie Hoivik, Øistein Hovde, Magne Henriksen, Gert Huppertz-Hauss, Ole Hoie, Iril Kempski-Monstad, Inger Camilla Solberg, Njaal Stray, Jorgen Jahnsen, Bjorn Moum

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