Submitted on: 04 September 2001.
Revised on: 24 October 2001.
Accepted on: 03 December 2001.
___________________International Journal of Immunogenetics
http://reply.papertrans.cn/2/136/13563/13563-32.png
http://reply.papertrans.cn/2/136/13563/13563-33.png
http://reply.papertrans.cn/2/136/13563/13563-34.png
http://reply.papertrans.cn/2/136/13563/13563-35.png
http://reply.papertrans.cn/2/136/13563/13563-36.png