目的探讨非清髓异基因外周造血干细胞移植（NAST）在治疗高龄血液病中的作用。

Objective To study the role of nonmyeloablative allogeneic peripheral blood stem cell transplantation (NAST) in the treatment of hematological diseases in elderly patients.

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本研究旨在探讨非清髓异基因外周血造血干细胞移植(NAPBSCT)后造血嵌合体的临床意义。

The aim of this study was to analyze the hematopoietic chimerism after non-myeloablative allogeneic peripheral blood stem cell transplantation (NAPBSCT).

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