http://hl7.org/fhir/StructureDefinition/condition-occurredFollowing|5.2.0

Further conditions, problems, diagnoses, procedures or events or the substance that preceded this Condition.

element_id	types
Extension
Extension.extension
Extension.url
Extension.value[x]	CodeableConcept,Reference
Extension
Extension.id	http://hl7.org/fhirpath/System.String
Extension.extension	Extension
Extension.url	http://hl7.org/fhirpath/System.String
Extension.value[x]	CodeableConcept,Reference