1. Gambro Renal Products, Lakewood, CO and Nephrology Division, Indiana University School of Medicine, Indianapolis, IN - USA
2. Extracorporeal Dialysis Section, Cleveland Clinic Foundation, Cleveland, OH - USA
3. Department of Surgery, University of Michigan, Ann Arbor, MI - USA
4. Memorial Regional Hospital, Hollywood, FL - USA
5. Department of Nephrology, St. Bortolo Hospital, Vicenza - Italy