STANFORD, Calif.--(BUSINESS WIRE)--Not all lung cancer is due to a lifetime of smoking cigarettes. Sometimes the diagnosis is a mystery, and the stigma surrounding the disease makes it hard for patients to talk about. Now, researchers at the Stanford University School of Medicine and the Northern California Cancer Center have taken the first steps toward analyzing why people who never smoked get lung cancer. Their data, to be published in the Feb. 10 issue of the Journal of Clinical Oncology, shows that never-smokers get lung cancer more often than thought, with women even more at risk than men.