Tred, your point is well made.
If the 18 month data presents a picture that each participant in the Aussie trial (n=25) has shown stabilization (no further decline) or improvement, then there is no reason for any further reluctance by any national FDA-type organization to withhold 2-73 from its citizens. The governments might want to continue an evaluation of the results, but given its safety, 2-73 should be made available IMMEDIATELY!
As any statistician would recognize: if results from all previous trials are 0 in xxx,xxx to one that shows 25 for 25, it is significantly important!
P.S. Even if it is 20 of 25, the conclusion is the same.