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A 31 year study of cigarette smoking and colorectal cancer among over 600,000 Norwegian males and females found... http://t.co/FCzlzSwfwz
A 31 year study of cigarette smoking and colorectal cancer among over 600,000 Norwegian males and females found... http://t.co/FCzlzSwfwz
Cigarette smoking and colorectal cancer mortality among 602242 Norwegian ... - Dove Medical Press http://t.co/evlFf731wd
Cigarette smoking and colorectal cancer mortality among 602,242 Norwegian males and females http://t.co/KqRSmkcW7y