I just can't stop beating this dead horse From the latest powerpoing presentation, slide 14, a variety of study 'endpoints' are listed which include 'progression free survival time' and 'duration of response and time to response'. Then immediately below it 'Primary endpoint (response) has been met'.
Based on what I've read so far it does not appear that progression free survival is the endpoint i.e. half the patients have had objective progression of their or have died as CP suggests.