1. Renal Therapy Services, Instituto Nacional del Riñón, Bogotá, Colombia
2. Sheffield Teaching Hospital, NHS Foundation Trust, Sheffield, UK
3. Renal Therapy Services, Bogotá, Colombia
4. Division of Baxter Novum and Renal Medicine, Department of Clinical Science, Intervention and Technology, Karolinska Institute, Stockholm, Sweden
5. Clinical Research Institute, School of Medicine, Universidad Nacional de Colombia, Bogota, DC, Colombia
6. Baxter Healthcare Corporation, Deerfield, IL, USA
7. Renal Therapy Services, Latin America, Bogotá, DC, Colombia