Interesting thought. Maybe a freudian slip with 81 sites? I was wondering why they would have to go to all sites if all patients at some sites had evented. I just hope they have a plan for regular PR's to keep info flowing. It would be bad to go dark for 6 months now.
I don't believe so. It is unlikely that all 81 sites will each have exactly one patient alive. I believe that some will have 1 alive, a few 2,3 etc. alive and some will have none alive. Perhaps they only have to visit 81 sites because the remaining 5 sites had already been visited or perhaps they had been visited and were closed at some point .