Use a current limited EHT supply - that way if you do get a shock you're unlikely to kill yourself. That paper suggests you only need ~120uA which is way below the current required to kill yourself. If you get a supply limited to a few mA then it's not that dangerous (still try to avoid shocks though!)
I don't think it needs saying that an EHT supply contacting any piece of electronics will instantly fry it, so be careful.
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