Objectives. In order to enhance the immunity of cancer patients to prevent relapse or to prolong survival time, umbilical cord\nblood mononuclear cells (UCMCs) were transplanted to cancer patients. Patients and Methods. UCMCs were transfused to 63\nimmunocompromised gastrointestinal cancer patients with nonmyeloablative (NMA) conditioning regimen. Results.The clinical\nstudy showed that the number of both T and B cells increased much more rapidly after transfusion of UCMCs than that of the\ncontrol group without transplantation (
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