description: Number of studies selected for inclusion. package_name: hl7.fhir.uv.ebm derivation: constraint name: ResearchStudyNumberOfStudiesIncluded type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/ebm/StructureDefinition/research-study-number-of-studies-included'} index: 1 value: choices: [valueUnsignedInt] index: 3 valueUnsignedInt: {type: unsignedInt, choiceOf: value, index: 4} package_version: 1.0.0-ballot2 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/uv/ebm/StructureDefinition/research-study-number-of-studies-included base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0-ballot2