Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The coverage among resources. Master file and Refined Master file=result from figure 2. UMLS, Unified Medical Language System; ADAM, Another Database of Abbreviations in Medline; Stedman's, Stedman's Medical Abbreviations, Acronyms & Symbols.
