原文是all 12 hESC lines derived from such arrested embryos have been' h0 h9 O M# k5 t1 e2 m; v" Z% K
shown to be karyotypically normal and their pluripotency * K) |/ j0 D4 \2 H9 W* Q- {# zand differentiation potential has been demonstrated both in ! l& [) ~# J+ z+ A+ Qvitro and in vivo.