MBTPS1 and neoplasm: Treatment with USMB only (23.4±6.8%), 10 Gy/5F (20.1±4.1%) and 10 Gy/5F+ USMB (23.8±10.4%) showed reduced proliferation rates at similar levels, whereas 20 Gy/5F treatment (13.3±3.0%) showed further reduced proliferation and 20 Gy/5F+USMB treatment (8.8±1.2%) showed the greatest reduction in proliferation, indicating that S1P, fXRT and USMB treatment have compounding effects on tumour proliferation in a dose-dependent manner (Fig. 3C).