1 Minneapolis VA Evidence-based Synthesis Program Center and the Center for Chronic Disease Outcomes Research, Minneapolis VA Health Care System, Minneapolis, Minnesota2 Department of Veteran Affairs, Veterans Health Administration, Washington DC, and The George Washington University, Washington DC3 Urology Section, Minneapolis VA Health Care System and Department of Urology, University of Minnesota, Minneapolis, Minnesota4 Specialty Care - Colon and Rectal Surgery, Minneapolis VA Health Care System, and Division of Colon and Rectal Surgery, University of Minnesota, Minneapolis, Minnesota5 Gastroenterology Section, Minneapolis VA Health Care System and Division of Gastroenterology, University of Minnesota, Minneapolis, Minnesota6 Section of General Internal Medicine, Minneapolis VA Health Care System and University of Minnesota School of Medicine, Minneapolis, Minnesota