By the way my research professor used to jump on our case whenever we slipped and used the word prove. Research supports, indicates, suggests, etc., but it never proves. There is always in any human endeavor, including research, the chance for an error or something to be missed thus you can never be absolutely certain that the independent variable is the cause of the change.
It is not that much different than the previous Glioma PII data that was released a long time ago. More mature data with more participants involved now. More people just got wind of this abstract. They announced Parsa was presenting.