Immunosuppression Withdrawal for Stable Pediatric Liver Transplant Recipients

Anti-rejection medicines, also known as immunosuppressive drugs, are prescribed to organ transplant recipients to prevent rejection of the new organ. Long-term use of these medicines places transplant recipients at higher risk of serious infections and certain types of cancer. This study seeks to: * Find out if it is safe to slowly reduce and then completely stop the immunosuppression taken by children who have received liver transplants. This process is called 'immunosuppression withdrawal'or ISW. * Find blood or liver biopsy tests that can help transplant doctors in the future to predict if it is safe to decrease or stop immunosuppression drugs in children who have had a liver transplant.