http://reply.papertrans.cn/2/155/15494/15494-11.png
http://reply.papertrans.cn/2/155/15494/15494-12.png
http://reply.papertrans.cn/2/155/15494/15494-13.png
http://reply.papertrans.cn/2/155/15494/15494-14.png
http://reply.papertrans.cn/2/155/15494/15494-15.png
http://reply.papertrans.cn/2/155/15494/15494-16.png
http://reply.papertrans.cn/2/155/15494/15494-17.png
Submitted on: 28 August 2007.
Revised on: 28 November 2007.
Accepted on: 27 January 2008.
___________________Journal of Basic and Clinical Health Sciences
http://reply.papertrans.cn/2/155/15494/15494-19.png
http://reply.papertrans.cn/2/155/15494/15494-20.png