This study will also identify biomarkers for ulcerative colitis. Biomarkers are things that doctors can find in blood, stool, or bowel tissue that indicate how much inflammation there is in the bowel, how the inflammation is produced, and whether the inflammation is responding to treatment. Collecting response and remission (free of symptoms) information on these standardized treatments and the "biomarkers" can possibly help doctors create a model, or plan to know which children with UC may respond quickly, or which children may develop complications.