# vitamin A deficiency

> lack of vitamin A in blood and tissues

**Wikidata**: [Q2655893](https://www.wikidata.org/wiki/Q2655893)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Vitamin_A_deficiency)  
**Source**: https://4ort.xyz/entity/vitamin-a-deficiency


## References

1. [Nuovo soggettario](https://thes.bncf.firenze.sbn.it/termine.php?id=39551)
2. Monarch Disease Ontology release 2018-06-29
3. Disease Ontology
4. Freebase Data Dumps. 2013
5. [Source](http://www.patient.co.uk/patientplus/v.htm)
6. Human Phenotype Ontology release 2018-03-08
7. [Source](https://cdn.who.int/media/docs/default-source/classification/icd/icd-10/icd-10-to-meddra-map---june-2023---codes-mapping.xlsx)
8. National Library of Israel Names and Subjects Authority File
9. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)