This was confirmed later when animal testing found it to cause benign and malignant tumors in the mammary glands, stomachs, esophagi, and lungs of rodents of both sexes, although insufficient evidence exists in human exposure.
This was later verified when animal testing revealed it to cause non-cancerous and cancerous growths in the mammary glands, stomachs, esophagi, and lungs of male and female rodents, although insufficient evidence exists regarding human exposure.