As I recall from the CTAD Dec 2016 slides there was dramatic improvement in P300 but point me to the data you are referring to and I am happy to take a look.
It was part of the 31 week data though I don't think on the poster (no surprise there)...not sure where to find that any more.
You can see the amplitude plot over time in the December CTAD presentation as well...and yes, it was higher again at 52 weeks
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