An ERD (Entity Relationship Diagram) is a graphical representation of the data in rest within a system (e.g. a business, an organization, an application) that is subject to analysis.
1. REFERENCE DOSE (RfD): DESCRIPTION AND USE IN HEALTH RISK ASSESSMENTS. 1.1. INTRODUCTION. This concept paper describes the U.S. Environmental Protection Agency's (U.S. EPA) principal approach to and rationale for assessing risk for health effects other than cancer and gene mutations from chronic chemical exposure.
Radiofrequency Ablation (RFA) is an FDA-approved endoscopic technique in which diseased tissue is exposed to heat energy and destroyed. Specialists at the Massachusetts General Hospital Barrettâs Esophagus Treatment Center offer RFA to treat Barrett's esophagus. RFA was first used to treat Barrettâs esophagus in 2005.