1 Department of Internal Medicine, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa. Electronic address: saraladevi.naicker@wits.ac.za.
2 Kidney Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan; Department of Nephrology, Chang Gung Memorial Hospital, Linkou, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan. Electronic address: cwyang00@gmail.com.
3 George Institute for Global Health, New Delhi, India; School of Public Health, Imperial College, London, UK; Prasanna School of Public Health, Manipal Academy of Medical Education, Manipal, India.