Late rejection greater than 1 year after pediatric heart transplantation: An ominous finding: SA Webber, DC Naftel, J Parker, N Mulla, I Balfour, L Cipriani, JK Kirklin, WR Morrow and the Pediatric Heart Transplant Study. Depts of Pediatrics and Surgery, Pittsburgh, Arkansas and Cardinal Glennon Children's Hospitals, Loma Linda Medical Center and University of Alabama, USA