Submitted on: 29 November 2008.
Revised on: 06 January 2009.
Accepted on: 22 January 2009.
___________________Cell Stem Cell---CELL PRESS
http://reply.papertrans.cn/1/50/4942/4942-32.png
Submitted on: 08 September 2001.
Revised on: 28 October 2001.
Accepted on: 10 November 2001.
___________________Cell Stem Cell---CELL PRESS
http://reply.papertrans.cn/1/50/4942/4942-34.png
http://reply.papertrans.cn/1/50/4942/4942-35.png
http://reply.papertrans.cn/1/50/4942/4942-36.png