1. Department of Nephrology, Coimbra Hospital and University Center, Coimbra, Portugal
2. University Clinic of Nephrology, Faculty of Medicine, Coimbra University, Coimbra, Portugal
3. Department of Urology and Kidney Transplantation, Coimbra Hospital and University Center, Coimbra, Portugal
4. Faculty of Medicine, Coimbra University, Coimbra, Portugal