Earlier, researchers at Yale University found that long-term use of dark hair dye by women who began coloring their hair before 1980 may increase the risk of non-Hodgkin's lymphoma.

After a sorority sister was diagnosed with non-Hodgkin's lymphoma, Couchenour decided to join the charity running group Team in Training.

Ernie Vallebuona, a former vice detective with the New York City Police Department, learned he had aggressive non-Hodgkin's lymphoma three years after working at ground zero.