1. From the Departments of Pediatrics and Infection Prevention, Yale New Haven Children’s Hospital, and the Departments of Pediatrics and Epidemiology, Yale School of Medicine and Yale School of Public Health, New Haven, CT (R.S.B.); the Departments of Radiology (K.N.), Pediatrics (K.A.S., V.M.P.), and Pathology (V.M.P.), Massachusetts General Hospital, and the Departments of Radiology (K.N.), Pediatrics (K.A.S.), and Pathology (V.M.P.), Harvard Medical School — both in Boston; and the Department of...