Humans, too: https://www.jospt.org/doi/10.2519/jospt.2012.3787

I remember treatments like these happened in GP's offices in the 1980s.

Very curious how you get IRB approval to microwave monkeys.

There is no IRB for monkeys.

The animal equivalent to an IRB is usually an Institutional Animal Care and Use Committee (IACUC), but the laws they are subject to vary with jurisdiction, and their use is optional if your grant provider (i.e. NIH) or academic publisher do not require them.

I beg your pardon?

Try it: you'll see. Low power recommended.

Humans like to sit in saunas.