Lung Cancer's Association with Elevation. (IMAGE) PeerJ Caption In the left hand panel, lung cancer incidence is plotted against elevation for western US counties. Darker counties have higher populations and thus lower observational errors. The right hand panel shows the association when accounting for additional factors, such as smoking and education. Credit Simeonov and Himmelstein Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.