A randomized trial of vitamin C and E suplementation in the prevention of recurrence of colorectal potyps: Gail E. McKeown-Eyssen, Ph.D.,∗,† Cathy holloway, M.Sc.,∗ Vartouchi Jazmaji,‡ Peter Dion, Ph.D.,∗ and W. Robert Bruce, M.D., Ph.D.,‡ ∗Ludwig Institute for Cancer Research, Toronto Branch, 9 Earl Street, Toronto, Ontario M4Y 1M4. †Department of Preventive Medicine & Biostatistics, University of Toronto, McMurrich Building, 4th Floor, 12 Queen's Park Cresent West, Toronto M5S IA8, and ‡Department of Medical Biophysics, University of Toronto, 500 Sherbourne Street, Toronto, Ontario M4X IK9, Canada