There was a study done by the Southern California Research Institute about 10 years ago. A study was also done in Arizona, and one in Minnesota, and we are currently in the process of doing one here in Canada.
We just finished one, looking at the evaluations. We've done it, to date, in Canada to see how accurate the evaluators are compared to the toxicology samples that have been attained. That was done by the Canadian Centre on Substance Abuse and came out to a 98.6% accuracy rate.