1Paediatric Nephrology Centre, Hong Kong Children's Hospital, Kowloon, Hong Kong

2Department of Paediatric and Adolescent Medicine, Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong

3Division of Nephrology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong

4Renal Diseases Research Unit, Genetics and Rare Diseases Research Division, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy

5Departments of Medicine and Pediatrics, Women's College Hospital, Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada

6Department of Paediatric Nephrology, Great Ormond Street Hospital for Children NHS Trust, London, United Kingdom

Correspondence: Dr. Eugene Yu-hin Chan, Paediatric Nephrology Centre, Hong Kong Children's Hospital, Hong Kong, or Dr. Kjell Tullus, Department of Paediatric Nephrology, Great Ormond Street Hospital for Children National Health Service Trust, London, United Kingdom. Email: [email protected] or [email protected]

Published online ahead of print. Publication date available at www.cjasn.org.