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-genderIdentity': maximum cardinality of 'extension' is 1