(A) At 6 to 8 weeks post-transplant, some NK cell function had returned in 7 of 22 patients. Among other patients, 7 patients demonstrated low NK cell function (bracket) while 8 others did not recover lymphocytes (not shown). (B) The impact of NK DLI was monitored in 7 patients that had not previously responded. Of those patients, 4 responded within 6 to 8 weeks post-DLI. (C) In one patient, NK cell function returned gradually following a 2^nd and 3^rd DLI.