摘要：

The present invention relates to methods repairing, regenerating, and reconstituting tissues by transplanting at least two stem cell populations, wherein the first and the second population of stem cells are introduced into a subject separated by a time interval of about 2 to about 24 hours. The stem cells can be derived from umbilical cord, mobilized peripheral blood, or bone marrow. The cells of at least the second population may be enriched for adult stem and progenitor cells. The methods of the invention are useful in accelerating hematopoeitic recovery in subjects following myeloablation or chemotherapy.

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