A new study conducted in South Korea suggests children who live close to an AM radio transmission tower may have an elevated risk of leukemia. According to Radio World, researchers found that children who lived within 2 kilometers of an AM radio transmitter were twice as likely to develop lymphocytic leukemia as children who lived more than 20 kilometers away.

The study included 1,928 children with leukemia, 956 with brain cancer and 3,082 healthy children. The researchers took measurements of electric and magnetic fields surrounding AM transmission towers in various areas of South Korea. They then used a mathematical model to estimate residents' exposure to radiation from the towers.

The findings were published in the American Journal of Epidemiology.