<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>Any reagent that is used in vitro or in vivo for detection or screening of a particular disease or any health-related issue.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>