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After reviewing literature and conducting a two-round Delphi survey with 42 experts, a consensus emerged that emphasizes prioritizing clinical symptoms in diagnosis, with serum B12 as a screening marker supported by methylmalonic acid or homocysteine levels for additional confirmation
Sterility (USP ) The foundational test
Most guides gloss over these details, leaving you to figure out the math on your own
Biochemistry and clinical chemistry of vitamin B12 transport and the related diseases
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