# NLP Methods for Extraction of Symptoms from Unstructured Data for Use in Prognostic COVID-19 Analytic Models

> Research article (Journal of Artificial Intelligence Research, 2021) · cited 30× · AI/ML

**Wikidata**: [openalex:W3207128852](https://www.wikidata.org/wiki/openalex:W3207128852)  
**Source**: https://4ort.xyz/entity/nlp-methods-for-extraction-of-symptoms-from-unstructured-data-for-use-in-prognostic-covid-19-analytic-models