Peer Reviewed Clinical Flowchart Haematology An approach to the investigation of vitamin B12 deficiency when folate status is normal James P Isbister Full text: PDF Copied to clipboard Published in Low vitamin B12: what does it mean and what should I do? We recommend that this flowchart be read in context of the article in which it was published. To access the article, click the link above. Get full access Subscribe for full access to all articles Already a subscriber? Login here. Advertisement Advertisement Advertisement