1. Italian Registry of Dialysis and Transplantation. Report 2011 http://www.sin-ridt.org/Italia/Italia.htm
2. United States Renal Data System. Annual Data Report 2012 http://www.usrds.org/2012/slides/indiv/v2index.html
3. Registry of the European Renal Association-European Dialysis and Transplant Association (ERA-EDTA) 2011 http://www.era-edta-reg.org/files/annualreports/pdf/AnnRep2011.pdf
4. Dialysis Outcomes and Practice Patterns Study (DOPPS) Program. DOPPS Practice Monitor 2007 http://www.dopps.org/DPM/default.aspx
5. Vascular access use in Europe and the United States: results from the DOPPS;Pisoni;Kidney Int,2002