CLSN: (99.9%) I guess they're quite confident. lol. Given enough 9's one can cover any mean between 0 and max. 0 is obtained by all patients who event do so day 1, no other events (the trial is still enrolling, so yes this is possible). Max is when the first N enrollees all event at the interim, also no other events. OTOH, I am 99.9% confident that the authors are completely full of sh**.