A Study To Evaluate Both The Efficacy and Safety Profile of CP-690,550 In Patients With Moderately to Severely Active Ulcerative Colitis

Inclusion Criteria

• •Subject must be at least 18 years of age.
• •Males and females with a documented diagnosis of UC at least 4 months prior to entry into the study.
• •Subjects with moderately to severely active UC based on Mayo score criteria.
• •Subjects must have failed or be intolerant of at least one of the following treatments for UC:
• •* Corticosteroids (oral or intravenous).
• •* Azathioprine or 6 mercaptopurine (6 MP).
• •* Anti TNF therapy.