# FDA Warning Letter: Lauren R. Klein, MD, M.S.
> 2021-10-19 · Center for Drug Evaluation and Research | CDER · `1da396d9836e82e5`
## Letter
- **Company:** Lauren R. Klein, MD, M.S.
- **Posted Date:** 2021-10-19
- **Letter Issue Date:** 2021-05-06
- **Issuing Office:** Center for Drug Evaluation and Research | CDER
## Subject
Failure to obtain Investigational New Drug Applications
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*Source: [FDA Warning Letters](https://www.fda.gov/inspections-compliance-enforcement-and-criminal-investigations/compliance-actions-and-activities/warning-letters) · AI Analytics · CC0 1.0*