| Affiliation: | (1) Department of Pediatrics, Division of Rheumatology, University of Alabama at Birmingham, Birmingham, AL, USA;(2) Section of Dermatolgy, Division of Paediatric Medicine, Department of Paediatrics, The Hospital for Sick Children and University of Toronto, Toronto, ON, Canada;(3) Department of Radiology, Children’s Hospital of Alabama, Birmingham, AL, USA;(4) Division of Rheumatology, Departments of Paediatrics and Medicine, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada |
