An article was published in the American Journal of Epidemiology by Dr. Samuel
Milham Jr. of the Washington Department of Social and Health Services.
According to the article, Dr. Milham studied the deaths of 2,485 Washington
and California amateur (ham) radio operators between 1979 and 1984. Based
on a population this size, he found the following data:

Cause Expected Deaths Actual Deaths
Leukemia 29 36
Lymphatic & Blood Forming
Organ Cancers
72 89
Prostate Cancer 67.6 78