1 Habib Alrahman Charity Kidney Center, Omdurman, Sudan; Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA.
2 Department of Nephrology, Cairo University, Cairo, Egypt.
3 Department of Public and Global Health, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich CH-8001, Switzerland; Renal Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Paediatrics and Child Health, University of Cape Town, Cape Town, South Africa. Electronic address: valerie.luyckx@uzh.ch.
4 Department of Nephrology, School of Medicine, Marmara University, Istanbul, Turkey.
5 Division of Nephrology and Hypertension, American University of Beirut, Beirut, Lebanon; Section of Nephrology, Yale School of Medicine, New Haven, CT, USA.