There has never been a documented case of microshock. A U.S. Senate inquiry in the early 1970s, sparked by exaggerated reports of thousands of U.S hospital patients dying of microshock, heard expert testimony about the effect. A review of the evidence in the early 2000s found that not a single case had been reported in the 30 years since the Senate inquiry.
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But I recommend
Dyro* (on this matter and many others) - especially (in this case) Malcolm Ridgway's famous "The Great Debate on Electrical Safety - in Retrospect" (found at Chapter 65).
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19 Meg pdf
