1. Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania - USA
2. Division of Nephrology, Albany Medical College and Capital District Renal Physicians, Albany, New York - USA
3. Department of Surgery, Section of Trauma, Surgical Critical Care and Surgical Emergencies, Yale University School of Medicine, New Haven, Connecticut - USA
4. Division of Nephrology, Department of Medicine, University of Southern California Keck School of Medicine, Los Angeles, California - USA
5. VA Pittsburgh Healthcare System, University Drive Division, Pittsburgh, Pennsylvania - USA