Introduction

Affiliations

• ¹ Radiology Department, Children's Hospital of Philadelphia, 34th Street and Civic Center Boulevard, Philadelphia, PA, 10104, USA. victoria@email.chop.edu.
• ² Pediatric Section, Department of Radiology, Children's Hospital Colorado, University of Colorado School of Medicine, Aurora, CO, USA.
• ³ Division of Pediatric Radiology, Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, IN, USA.