求两篇英文文献，谢谢!

zhusealin

1  杂志：Methods Cell Biol. 2008;86:15-28.
" a& m- b$ m  r+ Q   题目：Autogeneic feeders for the culture of undifferentiated human embryonic stem cells in feeder and feeder-free conditions.1 y2 @7 @# H+ o' `& z
   作者：Choo A, Ngo AS, Ding V, Oh S, Kiang LS./ ]  [- k- l+ n# l1 A! |

( O7 R2 E& m1 i) m& I) @2  杂志：Biotechnol Bioeng. 2004 Nov 5;88(3):321-31.7 `) q. b% W3 N* |. P! q
   题目：Expansion of pluripotent human embryonic stem cells on human feeders.
$ W5 P& E: f) m* Q   作者：Choo AB, Padmanabhan J, Chin AC, Oh SK.