Assertion: cadmium's effect | /r/HasProperty | studied since 1950
Facets:
value: extensively
type: DEGREE
Source sentences:
text: The effect of cadmium exposure on human health has been studied extensively since the 1950s following the occurrence of Itai Itai disease in Japan as the result of post-menopausal women with low iron and zinc levels ingesting cadmium-contaminated rice.