Penis Structure and Finasteride

I was thinking of going on Propecia but found this article: Effect of androgen deprivation on penile ultrastructure

I was wondering why Merck hasn’t mentioned this as a side effect. Is this claim true in humans?

This may occur in humans at doses of finasteride much higher than the 1mg dose level that is the therapeutic dose for hair loss. The study doesn’t say how much finasteride was administered or the frequency of dosing, but as the study is in rats, I wouldn’t know how it could apply to humans. Merck likely hasn’t mentioned it as a side effect, because it hasn’t been proven to be a side effect in humans. I don’t know how else to comment on this question.