http://reply.papertrans.cn/3/242/24135/24135-21.png
http://reply.papertrans.cn/3/242/24135/24135-22.png
http://reply.papertrans.cn/3/242/24135/24135-23.png
Submitted on: 19 June 2009.
Revised on: 07 July 2009.
Accepted on: 20 July 2009.
Patterns---CELL PRESS
http://reply.papertrans.cn/3/242/24135/24135-25.png
http://reply.papertrans.cn/3/242/24135/24135-26.png
http://reply.papertrans.cn/3/242/24135/24135-27.png
http://reply.papertrans.cn/3/242/24135/24135-28.png
http://reply.papertrans.cn/3/242/24135/24135-29.png
http://reply.papertrans.cn/3/242/24135/24135-30.png