Changes in NCIt Definitions:

C12219	Anatomic Structure, System, or Substance	Anatomic Structure, System, or Substance		A human biological structure, fluid or other substance; excludes single molecular entities.	C90259	NICHD Pediatric Terminology			C90259	NICHD Pediatric Terminology
C20189	Property or Attribute	Property or Attribute		A distinguishing quality or prominent aspect of a person, object, action, process, or substance.	C90259	NICHD Pediatric Terminology			C90259	NICHD Pediatric Terminology