Peter Attia· MD
but this is done in an open label fashion what that means is they're not randomizing patients to one drug versus the other typically they can but usually it's now we think we know one or two doses that are going to produce efficacy they were deemed safe in the phase one we're now going to [Music] take patients and give them this drug and look for an effect and a lot of times if there's no control arm in the study you're going to compare to the natural history