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1 Division of Rheumatology, Department of Pediatrics, University of British Columbia, 4480 Oak Street, Vancouver, BC, V6H 3V4, Canada. rpetty@cw.bc.ca.
2 Department of Rheumatology Immunology and Allergy, Children's Hospital, Zhejiang University School of Medicine, 57# Zhu Gan Road Zhejiang Province, Hangzhou, 310000, China.
1 Division of Rheumatology, Department of Pediatrics, University of British Columbia, 4480 Oak Street, Vancouver, BC, V6H 3V4, Canada. rpetty@cw.bc.ca.
2 Department of Rheumatology Immunology and Allergy, Children's Hospital, Zhejiang University School of Medicine, 57# Zhu Gan Road Zhejiang Province, Hangzhou, 310000, China.