description: A reference to results of investigations that confirmed the certainty of the diagnosis. Examples might include results of skin prick allergy tests. package_name: fhir.r4.ukcore.stu1 derivation: constraint name: ExtensionUKCoreEvidence type: Extension elements: url: pattern: {type: uri, value: 'https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-Evidence'} type: uri index: 0 value: short: A reference to results of investigations that confirmed the certainty of the diagnosis choices: [valueReference] index: 2 valueReference: type: Reference short: A reference to results of investigations that confirmed the certainty of the diagnosis choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/DiagnosticReport'] index: 3 value[x]: elements: identifier: elements: assigner: type: Reference refers: ['https://fhir.hl7.org.uk/StructureDefinition/UKCore-Organization'] index: 4 package_version: 1.0.4 class: extension kind: complex-type url: https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-Evidence base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.1.0 required: [value, valueReference]