f:Questionnaire extension with URL = 'http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm|5.3.0-ballot-tc1': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/StructureDefinition/artifact-copyrightLabel|5.3.0-ballot-tc1': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/StructureDefinition/designNote|5.3.0-ballot-tc1': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-assemble-expectation': maximum cardinality of 'extension' is 1 f:Questionnaire/f:item extension with URL = 'http://hl7.org/fhir/StructureDefinition/questionnaire-hidden|5.3.0-ballot-tc1': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/5.0/StructureDefinition/extension-Questionnaire.item.disabledDisplay': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/5.0/StructureDefinition/extension-Questionnaire.item.answerConstraint': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/StructureDefinition/designNote|5.3.0-ballot-tc1': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-optionalDisplay': maximum cardinality of 'extension' is 1