Assertion: pernicious anemia | /r/CreatedBy | vitamin b.sub.12deficiency
Facets:
value: in the elderly
type: LOCATION
Source sentences:
text: and Canadian authorities decided against boosting fortification to achieve the optimal levels needed for prevention of neural tube defects, because high levels of folic acid can mask pernicious anemia caused by vitamin [B.sub.12] deficiency in the elderly, leading to irreversible neural damage, especially peripheral neuritis.