A systematic review and meta-analysis published in The Journal of General Internal Medicine found that periodontal disease increases the risk of coronary heart disease by 24 to 34 percent. One reason might be the presence of harmful bacteria in the mouth, which not only causes gum disease but also promotes systemic inflammation throughout the body.
This article is about the Latin phrase. For the physical theory, see quantum electrodynamics. For other uses, see QED (disambiguation). Q.E.D. (also written QED) is an initialism of the Latin phrase quod erat demonstrandum, meaning what was to be demonstrated, or, less formally, thus it has been demonstrated.
edit Definitions of QA and QC. 1  Quality Assurance (QA) refers to the process used to create the deliverables, and can be performed by a manager, client, or even a third-party reviewer. 2  Quality Control (QC) refers to quality related activities associated with the creation of project deliverables. 3  Quality control is about adherence to requirements. 4  Qu