Assertion: vitamin b12's deficiency | /r/CapableOf | affect the brain and nervous system
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Pernicious Anemia : is the classic sign of deficiency, however, a deficiency usually affects the brain and nervous system first.
text: : is the classic sign of deficiency, however, a deficiency usually affects the brain and nervous system first.