“…The six trials included 1,519 patients, 763 in withdrawal arms and 756 in maintenance arms. In three trials, patients were randomized only if they did not have developed acute rejection (15,18,20), and in another two trials only if they did not have repeated, severe, or vascular acute rejection (17,19). In the other trial, randomization was performed on the day of transplantation, so that acute rejection was not a criterion for withdrawing steroids or not (16).…”