http://hl7.org/fhir/StructureDefinition/specimen-additive|5.2.0

References a resource or provides a code or text that specifies a substance that is added to a laboratory specimen (part of the container device or added to the specimen indenpendently).
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/CodeableReference
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/Substance
Extension.value[x].binding.valueSethttp://hl7.org/fhir/ValueSet/specimen-additive-substance