"My guess - Anavex either wasn't asked by the authors or they were and didn't provide them with data and the author didn't think the data released publicly was enough for the publication. "

 

This makes sense to me.  AVXL seems determined to keep the bulk of the results secret until they appear in the peer-reviewed publication.  So they are certainly not going share the results for someone else's publication.  And the AVXL PRs released so far are too ambiguous for anyone to rely on.