But that may not have anything to do with the cause of cancer, he said.

He was particularly interested in the cause and treatment of cancer.

There are reasons for serious concern about possible environmental causes of cancer.

Being exposed to radiation is a known cause of cancer.

"Environmental pollutants are not an important cause of cancer," he said.

I would not change places with him if he discovered the cause and cure of cancer.

But asbestos is second only to smoking as a cause of cancer.

Parasites are also a significant cause of cancer in animals.

Chemicals are not the dominate cause of cancer in this country.

Its role is to conduct and coordinate research into the causes of cancer.