1 Division of Pediatric Cardiology, Children's Mercy Kansas City, Kansas City, Mo.
2 Division of Pediatric Cardiology, NewYork-Presbyterian/Columbia University Irving Medical Center, New York, NY.
3 Division of Pediatric Cardiac Surgery and the Heart, Vascular, and Thoracic Institute, Cleveland Clinic, Cleveland, Ohio. Electronic address: karamlt@ccf.org.
Iterative evolution of truth - highlighting importance of associations between illness severity and socioeconomic/racial factors is a critical step forward.