1. Department of Nephrology, Head of the Hemodialysis and Apheresis Program, San Ignacio University Hospital, Pontificia Universidad Javeriana; Bogotá Colombia
2. Department of Nephrology, San Ignacio University Hospital, Pontificia Universidad Javeriana; Bogota Colombia
3. Renal Unit, San Ignacio University Hospital, Pontificia Universidad Javeriana; Bogota Colombia