==== The CommonEvidenceModel ==== The Common Evidence Model (CEM, formerly LAERTES) is a system that integrates numerous sources of evidence useful for investigating the association of drugs and health into a single system (see [[http://www.ohdsi.org/web/wiki/doku.php?id=projects:workgroups:kb-wg|project page]]). For more information on the CommonEvidenceModel refer to the [[https://github.com/OHDSI/CommonEvidenceModel/wiki|GitHub Wiki]].