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A comment on UV B LEDs More Effective in Producing Vitamin D3 in Human Skin (2017). Parent comment

Re:UV B LEDs More Effective in Producing Vitamin D3 in Human... by m0zg on Wednesday October 28, 2020 @06:30PM (#24924882)
Can confirm. This was daily routine in children's hospitals and some kindergartens. Aimed to prevent rickets. As were contrast foot baths.
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