1. From the Western University of Health Sciences, College of Osteopathic Medicine of the Pacific, 309 E 2nd St, Pomona, CA 91766 (A.G.R.); Department of Computer Science, Malone Center for Engineering in Healthcare, Johns Hopkins University, Balrimore, Md (C.J.); and Department of Radiology and Radiologic Science, Division of Interventional Radiology, Johns Hopkins Hospital, Baltimore, MD (C.R.W.).