Traditional polygraphs, the sort used in the sex-offender trial, measure changes in physiology usually breathing rate, blood pressure and sweating.

ECONOMIST: Polygraphs hit the big time

In spite of dramatic differences in the rates of the four cancers by race and sex, as well as dramatic changes over the 35-year time period, there was little evidence of a correlation between prevalence of mentholated cigarette use and cancer rates.

FORBES: Will Removing Menthol From Cigarettes Improve Health?

Because our ecologic observation from 24 years ago initially drew attention to menthol, we decided to examine ecologically the changes in the rates of four smoking-related cancers by race and sex from 1973 to 2007 in relation to the prevalence of smoking of mentholated cigarettes.

FORBES: Will Removing Menthol From Cigarettes Improve Health?