原文是all 12 hESC lines derived from such arrested embryos have been* ~, `& y6 s9 g, O" N: l
shown to be karyotypically normal and their pluripotency1 q; n5 ~" i! B8 c, ~! n
and differentiation potential has been demonstrated both in9 H# u. L2 S# C
vitro and in vivo.