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Bulletin of the World Health Organization|January 1, 1991
Surveillance of patients with chronic ulcerative colitis. WHO Collaborating Centre for the Prevention of Colorectal CancerB Levin, J Lennard-Jones, R H Riddell, et al.
American Journal of Human Genetics|July 1, 1996
Analysis of the contribution of HLA genes to genetic predisposition in inflammatory bowel diseaseI Naom, J Lee, D Ford, et al.
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