Troc, the UCLA Medical School is behind DCVax-L.
Look at the following quotes during the talks by Dr. Linda Liau and Dr. Leia Nghiemphu.
Dr. Linda Liau (Fellow of the National Academy of Medicine) talking about the DCVax-L therapy at the UAB on November 6th, 2020: "It is good for the patients."
Dr. Leia Nghiemphu of the UCLA School of Medicine on December 4th, 2020 at the UCLA Brain Tumor Virtual Conference: "There are many different types of vaccines... Here at UCLA, we use the dendritic cell vaccine."
UCLA is a top medical school and I don't think they will be using DCVax-L unless they know that it works.
The chance of a failed trial is 0%, imo.