Are you still going on about PFS? Who do you think you are convincing? OS is the gold standard. PFS is just a marker to shorten a trial that may or may not determine efficacy.
45 approvals id'ed where FDA accepted ext. control data in benefit/risk assessment; doing so for many reasons incl. rare nature of the disease, ethical concerns wrt use ofplacebo or no-treatment arm, seriousness of condition, and unmet medical need
13 authors from FDA, including Pazdur, published the article "External control arms in oncology: current use and future directions" in Annals of Oncology
Then MHRA in the UK endorsed historical controls, in the Pathway to a Cure report announced a month ago, in which british politicians from the All-Party Parliamentary Group on Brain Tumours, SPECIFICALLY pointed to DCVax-L
And last but not least we have Linda Liau being interviewed by JAMA saying at 7:59:
"There was a crossover arm designed into the trial and that was actually mandated by the FDA".