The subject will be allowed to proceed to baseline colonoscopy so long as all of the following laboratory criteria are met on baseline evaluation: Hgb greater than 10.0 gm/dl, platelet count greater than 100,000/ul; WBC greater than 3,000/ul; ALT less than 1.5 x upper limit of normal; AST less than 1.5 x upper limit of normal, alkaline phosphatase less than 1.5 x upper limit of normal, total bilirubin less than 1.2 x upper limit of normal, creatinine less than 1.5 x upper limit of normal, negative pregnancy test. For tests not mentioned specifically, there must be no clinically significant abnormalities which in the opinion of the PI would preclude a subject's safe participation.