description: The estimated patient age at which the allergy or intolerance resolved. Should be specified only if the status is resolved. package_name: hl7.fhir.uv.extensions derivation: constraint name: AIResolutionAge type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/allergyintolerance-resolutionAge'} index: 1 value: choices: [valueAge] index: 3 valueAge: {type: Age, choiceOf: value, index: 4} package_version: 5.2.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/allergyintolerance-resolutionAge base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.2.0-ballot required: [valueAge, value]