to define a potential role for the angiotensin system in crohn 's colitis , the colonic mucosal levels of angiotensin i and ii were measured in endoscopic biopsy samples from patients with active crohn 's colitis ( n = 20 ) , ulcerative colitis ( n = 13 ) , other forms of colitis ( n = 3 ) , and normal controls ( n = 17 ) .
C0003018
angiotensin
C0003006
angiotensin i