# FDA Warning Letters: A Retrospective Analysis of Letters Issued to Pharmaceutical Companies from 2010–2020

> Research article (Journal of Pharmaceutical Innovation, 2022) · cited 18× · AI/ML

**Wikidata**: [openalex:W4291666144](https://www.wikidata.org/wiki/openalex:W4291666144)  
**Source**: https://4ort.xyz/entity/fda-warning-letters-a-retrospective-analysis-of-letters-issued-to-pharmaceutical-companies-from-20102020