description: The estimated patient age at which the allergy or intolerance resolved. Should be specified only if the status is resolved. package_name: rs/hl7.fhir.r4b.core derivation: constraint name: resolutionAge type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/allergyintolerance-resolutionAge'} type: uri index: 1 value: choices: [valueAge] index: 3 valueAge: {type: Age, choiceOf: value, index: 4} package_version: 4.1.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/allergyintolerance-resolutionAge base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.1.0 required: [value, valueAge]