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Sibartie, S; Scully, P; Keohane, J; O'Neill, S; O'Mahony, J; O'Hanlon, D; Kirwan, W O; O'Mahony, L; Shanahan, F (2010). Mycobacterium avium subsp. Paratuberculosis (MAP) as a modifying factor in Crohn's disease. Inflammatory Bowel Diseases, 16(2):296-304.