aDivision of Pediatric Rheumatology, Allergy, and Immunology, Department of Pediatrics

bDivisions of Pediatric and Neuroradiology, Department of Radiology, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA

Correspondence to Shima Yasin, MD, MSc, Assistant Professor, Division of Pediatric Rheumatology, Allergy, and Immunology, Department of Pediatrics, Carver College of Medicine, University of Iowa, 200 Hawkins Drive, Iowa City, IA 52242, USA. Tel: +1 319 353 9099; e-mail: [email protected]