You do have to keep in mind that they're not a perfect model, though. For example, the "has been known to cause cancer in laboratory animals" label that used t

You do have to keep in mind that they're not a perfect model, though. For example, the "has been known to cause cancer in laboratory animals" label that used to be required on saccharin-containing products was removed after it turned out to be related to some unique characteristics of rodents' urinary tracts