Affiliation: | ? Division of Cardiology, Departments of Pediatrics and Immunology, The Hospital for Sick Children, Toronto, Ontario, Canada;† Division of Rheumatology, Departments of Pediatrics and Immunology, The Hospital for Sick Children, Toronto, Ontario, Canada;‡ The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada;§ Departments of Medicine and Obstetrics and Gynecology, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada |