f:Patient extension with URL = 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-race': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-ethnicity': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-birthsex': maximum cardinality of 'extension' is 1 extension with URL = 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-sex': maximum cardinality of 'extension' is 1 f:Patient/f:identifier/f:type id: maximum cardinality of 'id' is 1 text: maximum cardinality of 'text' is 1