1. From the Department of Radiology (D.W.C.), University of Colorado Anschutz, Aurora
2. Department of Pediatric Neurology (A.L.D., J.A.), University of Colorado Anschutz, Aurora
3. Department of Radiology (N.V.S., D.M.M.), Children’s Hospital Colorado, Aurora
4. Department of Biostatistics and Informatics, Colorado School of Public Health, Aurora (A.M.J.).