Yeah, I don't know.
If it makes 9%, short of 10% ... what happens...
The reason to go for 10% is because the Placebo-Effect can be as high as 7%. ( I don't know if that is true for cancer, but... in general )
I suppose if there is a miss on 10% but still high at 9.x% then it would be up to more in-depth analysis, tissue samples, case by case, and various breakdowns of the population, male/female, by nation, age, etc.,
It is a good question to ask Investor Relations.