Fifty-two cases of advanced head and neck cancer were treated by 434-MHz radiowave hyperthermia which was combined with cobalt radiotherapy and/or radioactive gold grain implant. Complete resolution of primary and secondary lesions occurred in 94% of cases, and the survival rate after three years was 54%. Retrospective study of comparable series revealed 62.5% resolution rate, and 29% survival after treatment with hyperbaric oxygen and cobalt, while after conventional supervoltage therapy, the resolution rate was 36.5%, and only 19% survived for three years.

Nelson, Holt, , , , , , , (1978). Combined microwave therapy. The Medical journal of Australia, 1978 Jul;2(3):88-90. https://www.ncbi.nlm.nih.gov/pubmed/713934