Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Reviewer's view of the efficacy data
EMA: sufficient nonclinical support for the hypothesized mechanism, though full understanding of effects not yet possible
“Sufficient non-clinical support for the hypothesized MoA is provided, although a full understanding of the lonafarnib induced effects on the set of complex mechanisms potentially affected is not possible to reach at this point.”