<qa>  What is the name of the study that excluded patients with autoimmune diseases?8. Patients with autoimmune diseases are excluded: Patients with a history of Inflammatory Bowel Disease including Crohns disease and ulcerative colitis are excluded from this study as are patients with a history of autoimmune disease e.g., rheumatoid arthritis, systemic progressive sclerosis, systemic lupus erythematosus, Wegeners granulomatosis. 