1. Does B-carotene explain why reduced cancer risk is associated with vegetable and fruit intake?;Ziegler;Cancer Res,1992
2. Inhibition of carcinogenesis by minor dietary constituents;Wattenberg;Cancer Res,1992
3. Food group consumption and colon cancer in the Adelade case control study 1. Vegetables and fruit;Steinmetz;Int J Cancer,1993
4. Vegetables, fruit and cancer prevention: A review;Steinmetz;J. Am Diet Assoc,1996
5. Naturally occurring anti- carcinogenic substances in food stuffs;Fiala,1985