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. 2016 Jun 15;6:28237. doi: 10.1038/srep28237

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(A) B₁₂ test strip images and the corresponding T/C signals as illustrative results from the human trials (B) Blood vitamin B₁₂ concentrations of 12 human participants as predicted by the NutriPhone system and comparison to the standard method results, where B₁₂ deficiency cut-off was set differently at 332 pmol/L (left) and 221 pmol/L (right).