Massachusetts-based Advanced Cell Technology said it had devised a straightforward way to make blood vessel precursor cells out of the stem cells and plans to test them in humans.

• 立足于麻萨诸塞州的高级细胞技术院说他们发明了一条直接的方法将血管前体细胞直接从干细胞中分离并且计划在人身上测试它们。