description: The actual group observed in a study or groups of groups in an evidence synthesis. package_name: de.netzwerk-universitaetsmedizin.ebm-cpg derivation: constraint name: Cohorts abstract: true type: Group elements: type: pattern: {type: Code, value: person} index: 0 membership: pattern: {type: Code, value: definitional} index: 1 quantity: {mustSupport: true, index: 2} characteristic: {index: 3} package_version: 0.7.1-snapshot class: profile kind: resource url: https://www.netzwerk-universitaetsmedizin.de/fhir/cpg-on-ebm-on-fhir/StructureDefinition/cohorts base: http://hl7.org/fhir/StructureDefinition/Group version: 0.1.0 required: [quantity]