Original article is here (paywalled ๐). Not sure how far to take these results with such a tiny N but interesting if it can be replicated with a larger sample size. It looks like they initially hypothesized that HRT had caused the changes but ended up rejecting that idea in favor of it being the voice training.
voice feminization surgery is extremely risky and is only ever recommended in extreme cases
It's no more risky than any other transition surgery. I don't know why we demonise vocal surgery in trans fem circles instead of treating it like any other transition surgery, when ultimately, that's what it is.