This argument is fallacious, I believe, because there are many things that changed from one cohort to the next. The introduction of cigarette filters is only one such change. To assume that any observed changes in cancer risk from one cohort to the next must be attributable to one particular change - the filter - is not appropriate, in my view.

The consensus, which was reached over the weekend, requires public corrective statements from the CDC, the Mayo Clinic, Dr. Stan Glantz, and the University of Kentucky Cancer Center.

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