Assertion: diabetic retinopathy's stage | /r/HasProperty | distinguished
Facets:
value: depending on the severity of dr
type: OTHER
Source sentences:
text: Depending on the severity of DR, four stages can be distinguished in general: preretinopathy (R0), background retinopathy (R1), preproliferative retinopathy (R2), and active proliferative retinopathy (R3A) .