On the surface this would seem to be a very easy task. However, it is not as straightforward as it would seem. Any amount of RF energy that is absorbed in tissue is turned into heat. Just because heat is generated does not necessarily mean that a significant temperature increase will occur. The human body has more effective means of removing excess heat from tissue than simple thermal conduction.
Blood flow is a very effective means of carrying heat away from tissue.
It is sometimes difficult to distinguish whether or not an effect is thermal. Even though the cell culture dish was surrounded by water to cool it, many scientists were not convinced that the individual cells did not get heated. I do not personally know any scientist involved with RF Safety who does not believe that athermal bioeffects exist. Since RF Safety experts tend to be concerned with ways that RF can damage tissue, they are unlikely to mention athermal effects. These people don't deny that athermal effects exist, they just don't see any reason to talk about them.