Leslie Leighton is a medical historian and physician who practiced as a gastroenterologist in metro Atlanta for nearly 20 years. Leighton, a visiting lecturer in the Department of History, holds an M.D. degree from the Johns Hopkins School of Medicine, an M.S. degree in history from Georgia Institute of Technology, and M.A. and Ph.D. degrees in liberal arts from Emory University. Leighton has taught medical school students in Georgia and he is the president of the Atlanta Medical History Society. His research interests include the examination of the cause of the decline in coronary artery disease mortality that occurred in the United States in the late 1960s.