1. From the Department of Radiology, Phoenix Children’s Hospital, 1919 E Thomas Rd, Main Tower, Phoenix, AZ 85016 (C.L.S., M.C.P., R.N.S., L.G., D.R.B.); Department of Radiology, Mayo Clinic, Phoenix, Ariz (L.K.H.); Department of Radiology, UT Health San Antonio, San Antonio, Tex (V.S.K.); and Baylor College of Medicine, Houston, Tex (E.T.).