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.
Lumbar radiofrequency denervation (rfd) For Low Back Pain. A lumbar radiofrequency denervation (RFD) is an outpatient procedure for. treating low back, buttock, hip, and groin pain. It is also called lumbar facet. thermal coagulation or rhizotomy or radiofrequency ablation. This information. sheet will explain what it is. Your doctor can explain if it is for you.