1. From the Departments of Radiology (A.S., J.-A.O.S., B.P.L.) and Medicine (J.E.E.), Massachusetts General Hospital, and the Departments of Radiology (A.S., J.-A.O.S., B.P.L.) and Medicine (J.E.E.), Harvard Medical School — both in Boston; and the Department of Radiology, Icahn School of Medicine at Mount Sinai, New York (A.B.).