[1]Christchurch Kidney Research Group Department of Medicine University of Otago Christchurch 8140 New Zealand;
[2]Department of Nephrology Prince of Wales Clinical School University of New South Wales Sydney NSW 2052 Australia;
[3]Christchurch Kidney Research Group Department of Medicine University of Otago PO Box 4345 Christchurch 8140 New Zealand;
Acute kidney injury; Acute renal failure; Biomarkers; Creatinine;