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All the neoplasms, except for non-melanoma skin cancer, lymphomas and prostate, have been more common in patients not treated with thiopurines, however, significant differences have only been identified in colorectal and breast cancer. Non thiopurines vs thiopurines, bP value < 0.01 (OR = 0.96, 95%CI: 0.94-0.98); P value = 0.05 (OR = 0.99, 95%CI: 0.98-1).
