Thanks Spidey
I wouldn't expect many drops-out, as well, before all are treated, but afterwards.
After the last SOC treatment and many years many things could happen in this fragile population which can include elderlies: such as the guy dying of another cause or the guys just doesn't showing up to say "hello I'm alive !" (for any reason either good or bad for him). I remember reading from Taïwan study that they had to search for death certificates database to confirm death and cause of death of patient (of course they didn't show up to inform the doctors).
So I have no clue of how much it could be, some website mention enormous attrition and others figures like a few %. I'd be glad for it to be less than 5% of course as this would confirm survival is currently doing well
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