1 Wits Donald Gordon Medical Centre, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
2 FIND Global Health Campus, Chemin du Pommier 40, 1218 Le Grand-Saconnex, Geneva, Switzerland.
3 Department of Women and Children's Health, School of Life Course and Population Sciences, Faculty of Life Sciences and Medicine, King's College London, London SE5 9RJ, UK.
4 Centre for Nephrology, Urology and Transplantation, School of Immunology and Microbial Science, Faculty of Life Sciences and Medicine, King's College London, London SE5 9RJ, UK.
5 University Children's Hospital, Zurich, Zurich, Switzerland.
6 Department of Public and Global Health, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland.
7 Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
8 Department of Paediatrics and Child Health, University of Cape Town, Cape Town, South Africa.
9 University of Ghana - University of Ghana Medical Center, Legon, Greater Accra, Ghana.