求英文文献两篇，谢谢！

zhusealin

1杂志：Stem Cells Dev. 2010 Nov;19(11):1713-22. doi: 10.1089/scd.2010.0014. Epub 2010 Sep 9.
1 Z9 ^5 P( ~: R( Q+ @  c9 L题目：Undifferentiated propagation of the human embryonic stem cell lines, H1 and HSF6, on human placenta-derived feeder cells without basic fibroblast growth factor supplementation.
6 s3 Z  h/ w( W! T4 b) ~作者：Park Y, Choi IY, Lee SJ, Lee SR, Sung HJ, Kim JH, Yoo YD, Geum DH, Kim SH, Kim BS." N% K: `$ W. n& }- E7 p2 x

2 P, S0 \1 |" G. n/ Y7 j2杂志：Stem Cells Dev. 2007 Jun;16(3):421-8.3 x2 k0 ?  Z" s
题目：Human placenta-derived feeders support prolonged undifferentiated propagation of a human embryonic stem cell line, SNUhES3: comparison with human bone marrow-derived feeders.
/ X4 ?9 `  N: `( P$ d) ~; O, ?作者：Kim SJ, Song CH, Sung HJ, Yoo YD, Geum DH, Park SH, Yoo JH, Oh JH, Shin HJ, Kim SH, Kim JS, Kim BS.6 k. i- R) J2 E1 `1 x3 ]+ a& g