<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A role used to relate a disease to the type of normal cell in which the disease process begins. The domain and the range for this role are 'Disease, Disorder or Finding' and 'Anatomic Structure, System, or Substance', respectively.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>