University of Toronto - Division of Rheumatology, University of Toronto - Division of Rheumatology, University of Toronto - Division of Rheumatology, University of Toronto - Division of Rheumatology, University of Toronto - Division of Paediatric Medicine, University of Toronto - Division of Emergency Medicine, University of Toronto - Division of Cardiology, University of Toronto - Division of Paediatric Medicine, University of Toronto - Division of Paediatric Medicine, University of Toronto - Division of Rheumatology, University of Toronto - Division of Rheumatology, University of Toronto - Division of Rheumatology, University of Toronto - Division of Rheumatology, University of Toronto - Division of Rheumatology, University of Toronto - The Hospital for Sick Children - SickKids, University of Toronto - Division of Rheumatology and Independent

University of Toronto - Program for Neuroscience and Mental Health, University of Western Ontario - Department of Pediatrics, University of Toronto - Division of Infectious Diseases, University of Toronto - The Hospital for Sick Children - SickKids, University of Toronto - Division of Rheumatology, Caja Costarricense de Seguro Social (CCSS) - Hospital Nacional de Niños “Dr. Carlos Sáenz Herrera”, Caja Costarricense de Seguro Social (CCSS) - Hospital Nacional de Niños “Dr. Carlos Sáenz Herrera”, Caja Costarricense de Seguro Social (CCSS) - Hospital Nacional de Niños “Dr. Carlos Sáenz Herrera”, Caja Costarricense de Seguro Social (CCSS) - Hospital Nacional de Niños “Dr. Carlos Sáenz Herrera”, Caja Costarricense de Seguro Social (CCSS) - Pediatric Infectious Diseases Division, Caja Costarricense de Seguro Social (CCSS) - Hospital Nacional de Niños “Dr. Carlos Sáenz Herrera”, University of Toronto - Division of Rheumatology, University of Toronto - Department of Pediatrics, Iran University of Medical Sciences, Iran University of Medical Sciences, Iran University of Medical Sciences, University of Manitoba, University of Manitoba, McGill University - Montreal Children's Hospital, McGill University - Montreal Children's Hospital, University of Calgary, University of Calgary, University of Calgary, University of British Columbia (UBC) - Department of Pediatrics, British Columbia Children's Hospital Research Institute - Vaccine Evaluation Center, University of British Columbia (UBC) - Department of Pediatrics, McMaster University - Department of Pediatrics, University of Ottawa, University of Ottawa, University of Saskatchewan, University of Saskatchewan, Memorial University, University of Alberta - Stollery Children's Hospital and University of Toronto - Division of Neurology

Indiana University Purdue University Indianapolis (IUPUI) - Indiana University School of Medicine, Renaissance School of Medicine at Stony Brook University, University of Iowa - Carver College of Medicine, Temple University Lewis Katz School of Medicine, Georgetown University, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Western University, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Wayne State University, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Cornell University - Hospital for Special Surgery, University of Toronto - Division of Rheumatology, Cornell University - Hospital for Special Surgery, Hacettepe University, affiliation not provided to SSRN, University of Iowa - Carver College of Medicine, Leeds Teaching Hospitals NHS Trust, University of Ottawa, Alder Hey Children's NHS Foundation Trust - Department of Pediatric Rheumatology, affiliation not provided to SSRN, Swedish Medical Center and affiliation not provided to SSRN

Indiana University Purdue University Indianapolis (IUPUI) - Indiana University School of Medicine, University of Iowa - Carver College of Medicine, affiliation not provided to SSRN, Renaissance School of Medicine at Stony Brook University, Temple University Lewis Katz School of Medicine, affiliation not provided to SSRN, Georgetown University, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Wayne State University, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Western University, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Cornell University - Hospital for Special Surgery, University of Toronto - Division of Rheumatology, Cornell University - Hospital for Special Surgery, Hacettepe University, affiliation not provided to SSRN, University of Iowa - Carver College of Medicine, Leeds Teaching Hospitals NHS Trust, University of Ottawa, Alder Hey Children's NHS Foundation Trust - Department of Pediatric Rheumatology, affiliation not provided to SSRN, Swedish Medical Center and affiliation not provided to SSRN