Steroids are to be given equivalently in both groups only during the first week postoperatively. The regimen consists of 500 mg/day of Solumedrol intravenously for 3 postoperative days followed by daily oral methylprednisolone or IV Solumedrol at 1 mg/kg per day, decreasing to 0.5 mg/kg per day during the remainder of the week primarily to avoid hypersensitivity reactions to the induction antibodies. No further steroid use is planned.