1. From the Departments of Radiology (D.C., A.R.S., J.M.L.) and Medicine (J.M.L.), Montefiore Medical Center, 111 E 210th St, Bronx, NY 10467; and Departments of Epidemiology & Population Health (K.Y.), Systems and Computational Biology (K.Y.), Radiology (J.M.L.), and Medicine (J.M.L.), Albert Einstein College of Medicine, Bronx, NY.