It was incredibly difficult, but last fall scientists at the University of Wisconsin managed to isolate stem cells and get them to grow into neural, gut, muscle and bone cells.

• 这种疗法的困难之大难以想象，但是去年秋天威斯康星大学的科学家们就已设法分离出干细胞，并使这些分离出的细胞生长成神经、肠、肌肉和骨细胞。