求两篇英文文献，谢谢!

zhusealin

1  杂志：Methods Cell Biol. 2008;86:15-28.9 b' F0 b% _4 _
   题目：Autogeneic feeders for the culture of undifferentiated human embryonic stem cells in feeder and feeder-free conditions.
$ M. G; M2 ~; _: z   作者：Choo A, Ngo AS, Ding V, Oh S, Kiang LS.
# u* \0 k. Z2 @& i
# Q8 Q" t0 q  l7 i  Z" x2  杂志：Biotechnol Bioeng. 2004 Nov 5;88(3):321-31.
+ ~: z! e4 |. a- d& t4 w; n, G   题目：Expansion of pluripotent human embryonic stem cells on human feeders.
* e. G$ E9 B. J7 I4 \" c9 B' S   作者：Choo AB, Padmanabhan J, Chin AC, Oh SK.