Vegans and Colon Cancer Risk

http://www.medworm.com/index.php?rid=15415371&cid=c_64_6_f&fid=38304&url=http%3A%2F%2Fcoloncancer.about.com%2Fod%2Fnutritionanddiet%2Fa%2FVegans-And-Colon-Cancer-Risk.htm

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