Part ⅠA study on psychological factor in the patients with ulcerative colitis in remissionBACKGROUND AND AIMS: The pathogenesis of ulcerative colitis ( UC ) has been studied intensively, but remains unclear. Genetical susceptibility、environmental factors and dysregulated immune reaction have been approved as major causes of the disease. The recent researches reported that psychological factor was associated with the exacerbation and recurrent conditions of UC in remission, and presumed that psychological ...