Sadly, although the Surgeon General's report draws conclusions about the health impact of filtered cigarettes, it only cites one of these seven studies (the Luchtenborg study). And in citing that study, the report merely notes its finding that smoking increases colon cancer risk. It hides this study's finding that this increased colon cancer risk was only detected among smokers of non-filtered cigarettes!

Because this research was funded by the federal government (by the Army Research Office, to Cornell), it is subject to the human subjects research requirements. In addition, the involvement of two researchers at academic (federally-funded) institutions requires that the research be approved by an Institutional Review Board. Apparently, the research was approved by an academic IRB, a decision which I publicly question, for the above reasons.

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