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I was an electronics student at the time and understood magnetics and electricity. I grabbed my electric mixer, plugged it in, and ran it next to it's tester. The tester, of course, glowed much brighter with my mixer. I then asked him why I should buy his massager when I could accomplish the same thing by using anything that had an electric motor.
I don't think he liked me much after that.
Weigh that in with the risks of any surgery, and the fact that costs of surgery would offset years of chiropractic visits, it's probably still a good choice if it works.