The purpose of the study was to determine if rapid discontinuation of corticosteroids (also known as prednisone withdrawal) and maintenance immunosuppression with Prograf (tacrolimus) and CellCept (mycophenolate mofetil) while using Thymoglobulin (Rabbit antithymocyte globulin) will give similar safety and efficacy results compared to continuation of corticosteroids (also known as prednisone maintenance) and standard maintenance immunosuppression with Prograf (tacrolimus), CellCept (mycophenolate mofetil) while using Thymoglobulin (Rabbit antithymocyte globulin).