1 From the Department of Radiology and Nuclear Medicine, University of Amsterdam, Amsterdam University Medical Center, Academic Medical Center, Meibergdreef 9, Suite C1-423.1, 1105 AZ Amsterdam, the Netherlands (R.R.v.R.); and Department of Pediatric Infectious Diseases, Emma Children's Hospital, University of Amsterdam, Amsterdam University Medical Center, Academic Medical Center, Amsterdam, the Netherlands (D.P.).