Renal effects of N-acetylcysteine in patients at risk for contrast nephropathy: decrease in oxidant stress-mediated renal tubular injury - Drager, Luciano F.; Andrade, Lúcia; Toledo, João Felipe Barros de; Laurindo, Francisco Rafael Martins; César, Luiz Antônio Machado; Seguro, Antonio Carlos (Nephrology Dialysis Transplantation, 2004)