Assertion: avascular necrosis | /r/HasProperty | due
Facets:
value: usually
type: DEGREE
Source sentences:
text: When avascular necrosis occurs in the shoulder joint, it is usually due to long-term treatment with steroids, a history of trauma to the shoulder, or the person has sickle cell disease.
text: Avascular necrosis in children can be due to a congenital condition called Legg-Calvé-Perthes disease.