1. University of Otago Christchurch; Department of Medicine; 2 Riccarton Ave PO Box 4345 Christchurch New Zealand 8140
2. Mario Negri Sud Consortium; Clinical Pharmacology and Epidemiology; Via Nazionale 8/A Santa Maria Imbaro Chieti Italy 66030
3. University of Ioannina; Department of Hygiene and Epidemiology, School of Medicine; Panepistimioupoli Ioannina Greece 45110
4. University of Ioannina; Department of Primary Education; Ioannina Greece
5. University of Ioannina School of Medicine; Department of Hygiene and Epidemiology; Medical School Campus University of Ioannina Ioannina Greece 45110
6. The University of Sydney; Sydney School of Public Health; Edward Ford Building A27 Sydney NSW Australia 2006
7. The Children's Hospital at Westmead; Cochrane Renal Group, Centre for Kidney Research; Westmead NSW Australia 2145
8. University of Calgary; Department of Medicine; 7th Floor, TRW Building 3280 Hospital Drive NW Calgary AB Canada T2N 4Z6
9. University of Calgary; Cumming School of Medicine; 7th Floor, TRW Building 3280 Hospital Drive NW Calgary AB Canada T2N 4Z6
10. University of Alberta; Department of Medicine; 3048 RTF 8308-114 Street NW Edmonton AB Canada T6G 2V2
11. University of Bari; Department of Emergency and Organ Transplantation; Bari Italy 70100
12. Mario Negri Sud Consortium; Department of Clinical Pharmacology and Epidemiology; Santa Maria Imbaro Italy
13. Diaverum; Medical-Scientific Office; Lund Sweden. Amedeo Avogadro University of Eastern Piedmont; Division of Nephrology and Transplantation, Department of Translational Medicine; Novara Italy 28100