Though Vexcabular is somewhat correct about it being a fallacy, there is a degree to which the corporate environment encourages dishonesty for the sake of benefiting higher-ups, suchs as middle management, upper management, and the share holders. The arrangement of statistical data in a manner that looks relevant is not too difficult to do if one tries. Certainly though, the factor of 3 difference between corporate financed and otherwised financed is interesting to note.
As per physics, there is a rather large spectrum of light in the microwave section of electromagnetic radiation. Some frequencies tend to resonate with molecular bonds and cause a change in temperature. If the particular frequency of microwave light emitted from cell phone were to cause heat gain, then the maximim increase would still be limited to the wattage of the transmitter and stored energy amount in the battery.
Microwave radiation is lower energy light than those which tend to break down biomolecules, such as ultraviolet, xray, gamma. Light forms such as visible, infrared, microwave, and those with lower frequencies and longer wavelengths tend to be less dangerous. Microwave light does effectively induce heat gain though, but even so the wattage of the emission source and rate of heat sinking should be considered.