http://reply.papertrans.cn/1/47/4685/4685-31.png
Submitted on: 19 September 2009.
Revised on: 20 December 2009.
Accepted on: 20 January 2010.
___________________CANCER EPIDEMIOLOGY BIOMARKERS & PREVENTION
http://reply.papertrans.cn/1/47/4685/4685-33.png
http://reply.papertrans.cn/1/47/4685/4685-34.png
Submitted on: 06 September 2010.
Revised on: 18 October 2010.
Accepted on: 05 November 2010.
___________________CANCER EPIDEMIOLOGY BIOMARKERS & PREVENTION
http://reply.papertrans.cn/1/47/4685/4685-36.png