1 Nephrology and Infectious Diseases Research and Development Group , INEB, University of Porto , Porto , Portugal ; Department of Nephrology , São João Hospital Center , Porto , Portugal.
2 Department of Nephrology , São João Hospital Center , Porto , Portugal.
3 Nephrology and Infectious Diseases Research and Development Group , INEB, University of Porto , Porto , Portugal ; Department of Nephrology , São João Hospital Center , Porto , Portugal ; Department of Renal, Urologic and Infectious Diseases, Faculty of Medicine , University of Porto , Porto , Portugal.