Researchers have deployed chemicals to individuals on three continents, they found that no two wristbands had identical chemical detections. But the same 14 chemicals were detected in more than 50 percent of the wristbands returned from the United States, Africa and South America.
from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2019/04/190422131539.htm
from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2019/04/190422131539.htm
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