These authors used mice prone to mammary tumours, and found accelerated development of tumours when the animals were exposed to 2450 MHz for 2 hours per day, 6 days per week, for 11 months. They also treated mice with benzopyrene, which induces skin cancer, and exposed them to similar radiation for several months, and again found earlier development of cancer in the radiated animals compared to controls.

The SARs were as high as 6-8 w/kg, and could be associated with significant thermal effects.