Assertion: comfrey | /r/Causes | cancerous tumors
Facets:
value: in rats
type: LOCATION
Source sentences:
text: Although comfrey has been used as a food crop, and as a forage crop, in the past 20 years scientific studies reported that comfrey may be carcinogenic, since it appeared to cause liver damage and cancerous tumors in rats.
text: Although Comfrey has been used as a food crop, in the past 20 years scientific studies reported that Comfrey may be carcinogenic since it appeared to cause liver damage and cancerous tumors in rats.
text: Although Comfrey has been used as a food crop, in the past 20 years scientific studies reported that Comfrey may be carcinogenic, since it appeared to cause liver damage and cancerous tumors in rats.