SNOMED CT Release: January 2007
Subset Release: Apr 01, 2007

Significant changes
[1] Updated to Jan 2007 version of SNOMED CT
[2] Added 239 concepts.
[3] Retired 37 concepts (because they are retired in the new release of SNOMED
    CT).
[4] Added new column to show SNOMED status (in addition to subset status).
     ACTIVE (Current): The Concept is in current use and is considered active.

     ACTIVE (Limited): The Concept is of limited clinical value as it is based
     on a classification concept or an administrative definition.  Concepts
     with this status are still valid for current use and are considered
     active.

     INACTIVE (Retired): The Concept has been withdrawn without a specified
     reason. These concepts are considered inactive.

     INACTIVE (Duplicate): The Concept has been withdrawn from current use
     because it duplicates another Concept.  These concepts are considered
     inactive.

     INACTIVE (Outdated): The Concept has been withdrawn from current use
     because it is no longer recognized as a valid clinical concept.  These
     concepts are considered inactive.

     INACTIVE (Ambiguous): The Concept has been withdrawn from current use
     because it is inherently ambiguous.  These concepts are considered
     inactive.

     INACTIVE (Erroneous): The Concept has been withdrawn from current use as
     it contains an error.  A corrected but otherwise similar Concept may have
     been added to replace it. These concepts are considered inactive.