Dialysis treatments sustain the lives of nearly 400 000 US residents with end-stage renal disease (ESRD).1 The mortality rate for dialysis patients is approximately 10 times that of the general population,2,3 and each year more than 20% of dialysis patients die.1 These statistics have hardly changed in the past decade. Morbidity also remains high: dialysis patients frequently also have cardiovascular disease, anemia, bone disease, poor nutrition, inflammation, depression, and physical and cognitive impairment.