Spencer Dorn, M.D., MPH (IMAGE) University of North Carolina Health Care Caption Spencer Dorn, M.D., MPH, of the University of North Carolina at Chapel Hill, was lead author of the study. Credit UNC School of Medicine 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.