f:QuestionnaireResponse extension with URL = 'http://hl7.org/fhir/StructureDefinition/questionnaireresponse-completionMode': maximum cardinality of 'extension' is 1 f:QuestionnaireResponse/f:questionnaire extension with URL = 'http://hl7.org/fhir/StructureDefinition/display': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-extension-questionnaire-uri': maximum cardinality of 'extension' is 1 f:QuestionnaireResponse/f:item extension with URL = 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemMedia': maximum cardinality of 'extension' is 1 f:QuestionnaireResponse/f:item/f:answer extension with URL = 'http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemAnswerMedia': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/StructureDefinition/ordinalValue': maximum cardinality of 'extension' is 1