Assertion: structural scoliosis | /r/CreatedBy | unknown factor
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: It is usually caused by an unknown factor (idiopathic) or a disease or condition such as: Disorders that were present at birth (congenital), such as spina bifida , in which the spinal canal does not close properly; or a disorder that affects the formation of bones.