Krishna Reddy, MD, MS, a physician-investigator at the Medical Practice Evaluation Center and the Tobacco Research and Treatment Center at Massachusetts General Hospital and an Associate Professor of Medicine at Harvard Medical School, is the senior author of a recently published paper in Journal of the International AIDS Society: Tobacco Smoking, Smoking Cessation and Life Expectancy Among People with HIV on Antiretroviral Therapy in South Africa: A Simulation Modelling Study.