Assertion: chronic lead poisoning | /r/HasProperty | difficult to diagnose
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Although chronic lead poisoning is often difficult to diagnose in adults and symptoms are often not present at blood lead levels less than 40 mcg/dL, the triad of gout, hypertension, and chronic progressive kidney failure is commonly present in chronic adult lead poisoning.