*OMOP Common Data Model v5.1 Specifications* <br>*Authors: Christian Reich, Patrick Ryan, Rimma Belenkaya, Karthik Natarajan, Clair Blacketer* <br>***Release date needed*** [Back to Table of Contents](https://github.com/OHDSI/CommonDataModel/blob/master/Documentation/TableofContents.md) --- # 8.1 COHORT