Some cancer epidemiologists and doctors now argue that there is little evidence that either screening test has lowered the death rate significantly for its respective cancer.

She is a cancer epidemiologist at the Northern California Cancer Center, a private nonprofit research institute in Union City, Calif.

Nicholas Edward Day, CBE, FRS (born 24 September 1939) is a retired statistician and cancer epidemiologist.

"He believed that the public does not clearly understand what is harmful and what is not with regard to cancer," said Dr. Cedric Garland, a cancer epidemiologist at San Diego.

"Cancer Alley doesn't exist anymore, but the perception lingers," said Dr. Michael Greenberg, professor of public health and a cancer epidemiologist at Rutgers University.

Julian Peto is an English statistician and cancer epidemiologist.

Dr. Peter H. Gann, a cancer epidemiologist at Northwestern University and an author of the editorial in the journal, said: "It's unique to have an agent that does this, both delays the diagnosis while accelerating growth.

Dr. Richard Stevens, a cancer epidemiologist at Battelle, said that melatonin suppression may help explain the rise in breast cancer in developed countries where many women are exposed to electromagnetic fields.

But numerous cancer epidemiologists reviewed the protocol for the study and exposed errors that call the validity of its findings into question.

His mother retired as a cancer epidemiologist for the State Department of Health Services in Berkeley, Calif.