1 From the Departments of Radiology of Tata Memorial Hospital, Dr Ernest Borges Rd, Parel East, Mumbai, Maharashtra 40012, India (A.V.); University of British Columbia, Vancouver, British Columbia, Canada (P.K.); Peter MacCallum Cancer Centre, Melbourne, Australia (A.N.M.); and Bai Jerbai Wadia Hospital for Children, Mumbai, India (F.G.).