|1||NCT00272324||Completed||Aspirin/Folate Prevention of Large Bowel Polyps||
||Other / NIH||
||1121||All||21 Years to 80 Years (Adult, Senior)||NCT00272324||5R01CA059005-12||February 1992||January 2007||January 5, 2006||January 5, 2006||
|2||NCT00671346||Active, not recruiting||NORVIT and WENBIT - Long-term Follow-up||
||6839||All||27 Years to 86 Years (Adult, Senior)||NCT00671346||NSD-17895
|NORVITWENBIT||December 1998||December 2020||January 2021||May 5, 2008||November 5, 2015||
† Study has passed its completion date and status has not been verified in more than two years.