http://hl7.org/fhir/StructureDefinition/openEHR-exposureDate|4.0.1
Record of the date and/or time of the first exposure to the Substance for this Reaction Event.
description: Record of the date and/or time of the first exposure to the Substance for this Reaction Event. derivation: constraint name: exposureDate type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/openEHR-exposureDate'} index: 1 value: choices: [] index: 3 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/openEHR-exposureDate base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.0.1 required: [value]