There is unmet need for all tumor types. Question is are NWBO results real after all the bias built into the trial.
Guess you don't know the Optune device -- adhesive patches that are placed on the head, called transducer arrays. No "metal helmet", just adhesive fabric.
Optune is approved, DCVax-L isn't, so until it gets approved if it does, Optune is the most efficacious choice.