# vitamin B12 deficiency

> vitamin metabolic disorder that results from low blood levels of vitamin B12

**Wikidata**: [Q3234995](https://www.wikidata.org/wiki/Q3234995)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Vitamin_B12_deficiency)  
**Source**: https://4ort.xyz/entity/vitamin-b12-deficiency


## References

1. Disease Ontology
2. Monarch Disease Ontology release 2018-06-29
3. Freebase Data Dumps. 2013
4. [Source](http://frankhollis.com/temp/BMJ%20B12%20deficiency%20review.pdf)
5. [Source](http://www.patient.co.uk/patientplus/b.htm)
6. [Identifiers.org](https://registry.identifiers.org/registry/doid)
7. Human Phenotype Ontology release 2018-03-08
8. National Library of Israel
9. KBpedia