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A few published studies talking about microcurrent devices:
https://www.sciencedirect.com/science...
https://www.ncbi.nlm.nih.gov/pmc/arti...

Wound care with electrical stimulation:
https://www.mdpi.com/2227-9032/2/4/445
https://onlinelibrary.wiley.com/doi/1...
https://www.ncbi.nlm.nih.gov/pmc/arti...
https://www.ncbi.nlm.nih.gov/pmc/arti...

In this video I show you how the light for one of the world's most poserful laser's is made. The COIL laser for the YAL-1 laser uses light that is easily made by combining two chemicals to produce singlet oxygen

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