http://reply.papertrans.cn/2/109/10851/10851-11.png
http://reply.papertrans.cn/2/109/10851/10851-12.png
http://reply.papertrans.cn/2/109/10851/10851-13.png
http://reply.papertrans.cn/2/109/10851/10851-14.png
Submitted on: 09 May 2008.
Revised on: 12 July 2008.
Accepted on: 14 August 2008.
___________________Global Public Health---ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
Submitted on: 24 June 2007.
Revised on: 18 October 2007.
Accepted on: 06 November 2007.
___________________Global Public Health---ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD
http://reply.papertrans.cn/2/109/10851/10851-17.png
http://reply.papertrans.cn/2/109/10851/10851-18.png
http://reply.papertrans.cn/2/109/10851/10851-19.png
Submitted on: 08 October 2005.
Revised on: 20 November 2005.
Accepted on: 12 December 2005.
___________________Global Public Health---ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD