http://hl7.org/fhir/StructureDefinition/questionnaireresponse-reviewer|5.2.0

Individual responsible for ensuring that the questionnaire response have been completed appropriately and signs off on the content.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Extension
typehttp://hl7.org/fhir/StructureDefinition/Extension
Extension.value[x].typehttp://hl7.org/fhir/StructureDefinition/Reference
Extension.value[x].targetProfilehttp://hl7.org/fhir/StructureDefinition/Practitioner