Background: Cord blood banks are established worldwide as a result of the increased use of umbilical cord blood (UCB) transplantation.

• 摘要背景：脐带血库在世界各地的设置，应对于脐带血移植使用增加一趋势。相对于传统骨髓移植，主因脐带血移植有著较少排斥的现象。