1 From the Department of Radiology and Imaging Sciences, Emory University School of Medicine, 1365-A Clifton Rd NE, Suite AT-627, Atlanta, GA 30322 (P.B.); Department of Medical Imaging, University Hospital of Heraklion, Heraklion, Crete, Greece (M.E.K.); Northern Arizona University, Flagstaff, Ariz (L.X.X.H.); and Medical Research Institute of New Zealand, Wellington, New Zealand, and Artibiotics, Wellington, New Zealand (C.K.).