1. Renal Unit, Greys Hospital, Pietermaritzburg, South Africa
2. Renal and Intensive Care Units, Royal Devon and Exeter Hospital, Exeter, United Kingdom
3. Pediatric Nephrology Unit, Soba University Hospital, University of Khartoum, Sudan
4. Pondicherry Institute of Medical Sciences and Madras Medical Mission, Chennai, India
5. Department of Medicine, Botucatu School of Medicine, Sao Paulo, Brazil
6. Division of Nephrology-Hypertension, University of California, San Diego, USA
7. Division of Pediatric Nephrology, Shaare Zedek Medical Center, Jerusalem, Israel
8. Pediatric Nephrology Unit, Instituto da Criança of the Hospital das Clinicas of the University of Sao Paulo Medical School, Sao Paulo, Brazil
9. Pediatric Nephrology Department, Red Cross War Memorial Children's Hospital, University of Cape Town, Cape Town, South Africa
10. Department of Surgery, Red Cross War Memorial Children's Hospital, University of Cape Town, Cape Town, South Africa
11. School of Medicine, Pontificia Universidade Catolica do Parana, Curitiba, Brazil
12. Division of Pediatric Nephrology, University of Missouri-Kansas City School of Medicine, Kansas City, USA
13. Division of Nephrology, Queen's University, Kingston, Canada
14. Yale University, New Haven, USA