The 15 - country collaborative study of cancer risk among radiation workers in the nuclear industry: estimates of radiation - related cancer risks. (nejm.org)
The international safety limit for radiation workers is 50 millisieverts per year. (newscientist.com)
Because those who fly on jet airplanes frequently face higher exposure to cosmic radiation, the Centers for Disease Control and Prevention (CDC) classifies airline crew members as radiation workers. (businessinsider.com)