US Extension to SNOMED CT Updated. NLM Tech Bull. 2012 Sep-Oct;(388):b2.
The September 2012 update of the US Extension to SNOMED CT is available for download. The files contain only extension specific content and core content necessary to provide a bridge between the US Extension and the International Release. The download includes files in both SNOMED CT Release Format 1 (RF1) and Release Format 2 (RF2) versions. For more information about the US Extension to SNOMED CT, see UMLS News from April 2011.