Kilic A, Allen JG, Arnaoutakis GJ, George TJ, Cameron DE, Vricella LA, Weiss ES. Adult-derived Index for Mortality Prediction After Cardiac Transplantation (IMPACT) risk score predicts short-term mortality after pediatric heart transplantation. Ann Thorac Surg. 2012 Apr; 93(4):1228-34; discussion 1234-5.