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![PDF] Sublingual vitamin B12 compared to intramuscular injection in patients with type 2 diabetes treated with metformin: a randomised trial. | Semantic Scholar PDF] Sublingual vitamin B12 compared to intramuscular injection in patients with type 2 diabetes treated with metformin: a randomised trial. | Semantic Scholar](https://figures.semanticscholar.org/09492d7c4a2f76a1fddc09d55b909d3b4f259caf/4-Figure1-1.png)

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