1. University of Arizona College of Medicine—Phoenix, 475 N. 5th St., Phoenix, AZ 85004, USA
2. Department of Child Health & Orthopedics, University of Arizona College of Medicine—Phoenix, 1919 E. Thomas Rd., Phoenix, AZ 85004, USA
3. Department of Surgery, Medical School, Creighton University, Omaha, NE 68178, USA
4. Department of Radiology, Phoenix Children’s Hospital, 1919 E. Thomas Rd., Phoenix, AZ 85016, USA
5. Child Health and Radiology, University of Arizona College of Medicine—Phoenix, 475 N. 5th St., Phoenix, AZ 85004, USA
6. Radiology, Mayo Clinic, 5777 E. Mayo Blvd., Phoenix, AZ 85054, USA